Category: Repair

Your mini split was working flawlessly last week. Now it has started making an unsettling gurgling sound or blowing warm air into the room or there is even an odd looking small pool underneath its indoor unit leaving you to wonder whether this issue needs urgent attention or can simply be remedied easily within 10 minutes. Due to this uncertainty, we crafted this guide. Ductless systems can be reliable machines but maintenance needs arise occasionally; common problems with mini splits typically stem from airflow restriction, refrigerant issues, condensate drainage or electrical faults once identified it makes fixing or calling someone easier. Why Mini Splits Develop Problems Over Time A ductless system doesn’t fail randomly. It fails in patterns, and those patterns follow physics. Every mini split moves heat using refrigerant, a coil, a fan, and a drain path for condensation. Dust builds up on filters and coils the same way it collects on anything that moves air constantly. Condensate lines grow biofilm over months, the same slimy buildup you’d find in a shower drain. Refrigerant lines have flare fittings that can loosen slightly from vibration and temperature cycling, and a fitting doesn’t have to be badly loose to leak. None of this means the equipment is poorly made. It means a mechanical system exposed to humidity, dust, and daily temperature swings needs periodic attention. Houston’s humidity actually accelerates two of these issues specifically: mold growth in the drain pan and coil, and condensate line clogs, because there’s simply more moisture in the air for the system to pull out of your home. A common problems with mini splits running in a coastal, humid climate works harder than the same unit in a dry one, and that shows up faster in filters and drain lines than it does in, say, Arizona. Knowing this helps explain why the same complaints keep showing up. It’s not bad luck. It’s wear that follows a predictable path, and that’s actually good news, because predictable problems have predictable fixes. Read Why Is My AC Not Blowing Cold Air Most Common Problems With Mini Splits These 12 most common problems with mini splits AC occurs in most time.  1. Mini Split Not Cooling What it looks like: The unit runs, air comes out of the vents, but the room never actually cools down. Sometimes the air feels lukewarm instead of cold. Real cause: In most cases, this comes down to a dirty air filter choking off airflow, or the outdoor condenser being blocked by leaves, mulch, or a fence panel too close to the unit. Low refrigerant from a slow leak is the other frequent cause, especially if the problem has been getting gradually worse over a few weeks. DIY fix if safe: Pull the filter and rinse it under warm water. Check the outdoor unit and clear anything within two feet of it on all sides. When to call a pro: If cleaning the filter and clearing the outdoor unit doesn’t bring the cooling back within a day, you’re likely looking at a refrigerant leak or a coil problem, and that needs a licensed technician with EPA Section 608 certification to handle the refrigerant legally and safely. 2. Mini Split Not Heating What it looks like: The unit blows air but it’s not warm, or it cycles on and off without ever reaching the set temperature in heat mode. Real cause: Ductless heat pumps pull heat from outside air, even in cold weather, which means a blocked or iced-over outdoor unit hits heating performance hard. A control board glitch or a system stuck in defrost mode longer than it should be is another common culprit. DIY fix if safe: Check that the outdoor unit isn’t covered in debris or ice. Confirm the remote is actually set to heat mode and not auto, which can sometimes default to cooling logic depending on the indoor temperature reading. When to call a pro: Repeated failure to reach temperature, or a unit that runs constantly without warming the room, usually points to a refrigerant or reversing valve issue that’s outside DIY territory. 3. Water Leaking From Indoor Unit What it looks like: Drips or a small puddle forming on the wall or floor below the indoor head. Real cause: This condition typically results from a blocked drain line; condensation builds up faster than its pathway can transport away, and backs up into the drain pan until it overflows. A cracked drain pan, though less prevalent, also typically creates the same effect. DIY fix if safe: If you’re comfortable with it, a wet/dry vacuum at the outdoor end of the condensate line can sometimes pull a clog free. Turn the unit off first. When to call a pro: If the leak keeps coming back after clearing the line, or you can’t locate the drain termination point, a technician can flush the line properly and check for a cracked pan before mold sets in. 4. Strange Noises (Rattling, Buzzing, Gurgling) What it looks like: Sounds you didn’t hear when the system was new. Rattling, buzzing, gurgling, or an occasional popping. Real cause: Popping typically indicates the plastic housing expanding with temperature change and should not be cause for alarm. Gurgling usually only happens during normal defrost cycles; frequent or loud gurgling could indicate low refrigerant or air accumulation in your lines, while rattle indicates something is loose often fan blade or panel screws need tightening up, for instance while buzzing louder than soft hum could indicate struggling fan motor or electrical problems. DIY fix if safe: Check for loose covers or panels you can tighten yourself. When to call a pro: Rattling, banging, or persistent buzzing that doesn’t stop after a basic check needs a technician, since these often mean a component is failing internally. 5. Unusual Smells (Musty, Vinegar, Burning) What it looks like: An odor that comes through the vents when the system runs. Real cause: Musty or damp smells indicate mold growth on either the evaporator coil or

Houston summers push past 100°F for weeks at a time. When your HVAC system stops working, it is not just an inconvenience it is a health risk. Knowing how to fix heating and air conditioning problems fast can save you money and keep your family safe. This guide covers the most common heating and cooling problems, how to diagnose them, what you can fix yourself, and when to call a professional. Whether you are a homeowner, landlord, or new to Houston, this step-by-step guide has you covered. Key Takeaways Start every diagnosis by checking your thermostat and air filter first Most DIY fixes are safe refrigerant, compressor, and gas issues always need a pro Houston’s humidity makes filter changes and drain line checks more critical than in dry climates If repair cost exceeds 50% of a new system’s price and your unit is 10+ years old, replace it Quick Diagnosis: What’s Actually Wrong With Your HVAC? Before calling anyone, match your symptom to the likely cause below. Symptom Most Likely Cause AC running but AC not blowing cold air Low refrigerant, dirty filter, failed compressor Heater on but no warmth thermostat not working, bad igniter, failed heat strip System turns on and off every few minutes HVAC short cycling dirty filter, oversized unit, electrical fault Grinding or squealing noise blower motor repair needed Hissing near refrigerant lines signs of refrigerant leak in AC Banging sound on startup Loose components inside unit why does my AC smell musty Clogged condensate drain or mold in ducts Weak airflow from vents ductwork problems or failing air handler This table alone will save you an hour of guessing. Start here every time. 5 Most Common AC Problems and How to Fix Them AC Not Cooling or Blowing Warm Air This is the most common call we get at 75 Degree AC during Houston summers. Causes: low refrigerant signs, clogged filter, thermostat not working, or AC compressor failure symptoms. DIY fix: Check your thermostat is set to COOL and below current room temperature. Replace the air filter replacement if it looks gray or blocked. Check that all vents are open. When to call a pro: If the filter is clean and thermostat is correct, you likely have a refrigerant issue or compressor problem. Both require a licensed technician. Our team offers PROFESSIONAL AC REPAIR SERVICES with same-day response across Houston. Houston repair cost: Refrigerant recharge $200–$600. Compressor $1,200–$2,500+. Frozen Evaporator Coil What does a frozen AC coil look like ice forming on the copper lines near your indoor unit, or water pooling underneath it. Causes: Restricted airflow from a dirty filter, closed vents, or low refrigerant signs. DIY fix: Turn the system OFF. Switch the fan to ON (not AUTO) to thaw the coil. This takes 2–4 hours. Replace the filter once thawed. When to call a pro: If the coil freezes again after thawing and a fresh filter, you have a refrigerant leak. Do not run a frozen system; it damages the compressor fast. Houston repair cost: Refrigerant leak repair $250–$750 depending on location of leak. AC Won’t Turn On how to fix AC that won’t turn on start at the breaker box, not the unit. Causes: circuit breaker tripped HVAC, failed capacitor, or faulty contactor. DIY fix: Go to your electrical panel and reset the HVAC breaker once. Wait 30 minutes before restarting the system. Warning: Never reset a tripped breaker more than once. Repeated resets can destroy your compressor. If it trips again, stop and call a pro. What is a capacitor in AC unit? It is a small cylinder inside your outdoor unit that starts the motor. A bulging or leaking capacitor is a clear failure sign. When to call a pro: Capacitor replacement costs $100–$300 in Houston including labor affordable and fast. Condensate Drain Line Clogged Houston’s humidity means your AC pulls a lot of moisture out of the air every day. That water drains through a PVC line. In summer, algae clogs it fast. How to unclog condensate drain line DIY: Turn off the system. Find the drain access port near your air handler. Pour one cup of white vinegar in. Wait 30 minutes. Use a wet/dry vac on the outdoor end of the drain line to pull the clog out. When to call a pro: If you see water damage near the air handler or the float switch keeps tripping, have a technician flush and inspect the full line. Houston repair cost: Professional drain flush $75–$150. Compressor Failure The compressor is the most expensive part of your AC system. AC compressor failure symptoms: System runs but produces no cold air, loud clicking or humming from the outdoor unit, or the outdoor unit stops running entirely. DIY fix: None. This is always a professional repair. When to call a pro: Immediately. A failed compressor on a system older than 10 years often means replacement is smarter than repair. 75 Degree AC will give you an honest repair vs. replace recommendation no upselling. Houston repair cost: Compressor $1,200–$2,500+. Full Expert Air Conditioning Replacement in Houston averages $4,000–$8,000 installed. 4 Most Common Heating Problems and How to Fix Them Heater Not Producing Heat Why is my heater blowing cold air? This is the heating version of the most common HVAC call. Causes: Thermostat set to wrong mode, dead igniter, failed heat strip, or tripped breaker. DIY fix: Confirm thermostat is set to HEAT. Replace batteries if it is battery-operated. Check the breaker for your furnace or air handler. When to call a pro: If the igniter or heat exchanger is the issue, this needs a licensed technician especially in Houston homes with gas furnaces. We provides Best Heating Services for Homes & Businesses in Houston including igniter replacement and full heating system tune-up. Houston repair cost: Igniter replacement $150–$400. Heat strip $200–$600. Blower Motor Won’t Turn On Why is my heating system making noise, grinding or squealing means the blower motor is struggling? Causes: Blown fuse, failed capacitor, worn belt,

If your AC is leaking water inside the house right now, here’s the short version: the water itself won’t hurt you today, but it gets expensive within 24 to 48 hours. A stain spreading across the ceiling, a drip from a vent, a puddle by the air handler closet all of it means the condensate path failed. This guide covers what to do right now, why an AC leaking water inside home is so common in Houston, real 2026 repair costs, and whether insurance pays for the damage. Is AC Leaking Water Inside House Dangerous? An AC leaking water inside house is not immediately toxic, but it turns dangerous within 24 to 48 hours. Standing water saturates drywall, insulation, and ceilings and the EPA confirms mold can start growing in that window. Turn the AC off and call a licensed technician. Don’t run it until the cause is found. Here’s the fuller picture on why an AC leaking water inside house needs fast action, even though the water itself starts out clean: A clogged condensate drain line the most common cause in Houston homes can dump up to 20 gallons a day into your attic or ceiling cavity before you ever see it. The EPA documents mold starting on wet drywall within 24 to 48 hours, and Houston’s summer humidity shortens that window further. Most Houston homes built before 2000 have attic-mounted air handlers, so an air conditioning leaking water problem up there soaks the ceiling from above with zero warning until the stain shows. 75 Degree AC (TACLA72152E, founded 2016) runs same-day diagnostics across Houston for exactly this problem. Call (713) 598-2737, seven days a week. Should You Turn Off an AC Leaking Water Inside Home? Yes, shut it off at the thermostat immediately. Every minute it runs, the coil pulls more moisture out of the air and pushes it toward a drain path that’s already failed. Then work through these five steps: Kill the cooling at the thermostat. Switch to OFF, not just a few degrees up. If the coil is frozen, set the fan to ON so it can thaw without adding more condensate. Check the air filter. A clogged filter starves the coil of airflow, freezes it, and the meltwater becomes your leak. A $15 filter causes a surprising number of these calls. Find the air handler attic, closet, or garage and check for standing water or dripping. Check the secondary drain pan. Water sitting there means the primary drain already failed and you’re on backup. Photograph everything with timestamps. If this becomes an insurance claim, dated photos plus a same-day service record are what gets it paid. If water is actively coming through the ceiling, skip the steps above and call for emergency service. Where Does the Water Actually Come From? Your AC is a dehumidifier that happens to cool. Warm, humid indoor air crosses the evaporator coil, moisture condenses on the cold fins, and gravity carries it into a pan and out through a 3/4-inch PVC drain line. No pump, no pressure on most setups just slope. The volume is bigger than people expect. With Houston’s summer dew points around 73°F, a central system can pull up to 20 gallons of water out of the air per day at peak load. Houston logged 145 days at or above 90°F in 2025, an all-time record and the average local system runs roughly 2,800 hours a year, nearly double the national average. That’s a lot of condensate funneling through one narrow pipe that almost nobody flushes. When that pipe clogs, 20 gallons a day has to go somewhere and “somewhere” is usually your ceiling. Than contact professional Trusted AC Leak Repair in Houston. Why Is Your AC Leaking Water Inside? (6 Real Causes) Six causes account for nearly every AC leaking water inside house call we run, ranked by how often our techs find them: Clogged condensate drain line. Algae and bacterial sludge grow inside the warm, wet PVC line, and Houston heat speeds this up. The line backs up, the pan overflows, water escapes. Frozen evaporator coil. Restricted airflow (dirty filter, blocked returns) or low refrigerant drops the coil below freezing. Ice builds, then thaws into more water than the pan can hold. Cracked or rusted drain pan. Common past the 12-year mark, especially in attic units cycling between 130°F summers and damp winters. Failed condensate pump. Closet and garage installs that can’t drain by gravity use a small pump. When the float sticks or the motor dies, water overflows onto the floor. Disconnected or back-sloped drain line. Code requires 1/8 inch of fall per foot of run. Foundation settling or a stepped-on attic line kills that slope. Improper installation. An unleveled air handler tips condensate away from the drain port common on rushed summer change outs. Notice what’s not on this list: “your AC is dying.” An AC dripping water almost never means you need a new system. Five of the six causes above are sub-$600 repairs. Why Are Houston Attic Units the Worst Case? Most pre-2000 Houston homes have attic-mounted air handlers. A drain failure up there behaves differently than one in a garage: The leak starts invisible. Water soaks attic insulation and the top of your drywall first. By the time a ceiling stain shows, the leak has usually been running for days. A backup pan is code, but only if installed. IRC section M1411.3.1 requires a secondary pan or shutoff device under attic units where overflow could damage the ceiling. Older Houston homes often predate enforcement. A float switch is the tell. If water reached your secondary pan, a working float switch should have already shut the system down. If it keeps running until the ceiling is stained, you likely don’t have one or it’s dead. Attic heat compounds everything. At 130°F+, algae grows faster in the line and pans corrode faster. A wired float switch runs $150–$350 installed. It’s the single best ceiling insurance a Houston homeowner can buy.

You’ve got a number in front of you from a technician, and something about it doesn’t sit right. If you’re typing “how much does an AC repair cost” into your phone with a stranger’s estimate open in another tab, that’s the exact situation this guide is built for. Below is a full, Houston-specific breakdown of AC repair cost by component, what a fair AC repair cost per hour Houston techs actually charge looks like, and the specific dollar thresholds where a quote crosses from “expensive because Houston” into “you should ask questions.” Every figure here reflects local Houston conditions, not a national blog average pasted onto a city name. That distinction matters more than it sounds. A capacitor here fails on a different schedule than one in Minneapolis, and the AC repair cost Houston homeowners pay reflects that. Quick Answer AC repair cost in Houston runs $150 to $900 for most jobs in 2026, averaging around $345, with a diagnostic or dispatch fee of $75 to $150 layered on top. A capacitor swap sits at the low end near $150–$300. A compressor replacement sits at the high end near $1,200–$3,500. 75 Degree AC charges a flat $89 diagnostic, credited to the repair, and holds Texas license TACLA72152E. Call (713) 598-2737 for a free second opinion on any quote. How Much Does AC Repair Cost in Houston? For most homeowners, AC repair cost Houston-wide lands between $150 and $900, with the average full repair diagnostic plus parts plus labor settling around $345. The cheapest common fix is a failed capacitor or a clogged condensate drain. The most expensive is a failed compressor or evaporator coil, which is usually the point where the conversation shifts from “repair” to “should I just replace this.” If you’re asking how much does a AC repair cost before you even let a technician start, the honest answer is: it depends entirely on which part failed, so treat any number given over the phone with zero inspection as a placeholder, not a quote. Repair Typical Houston Range (2026) Ask Questions Above Diagnostic / dispatch fee $75–$150 (flat $89 credited) $200 Capacitor replacement $150–$300 $500 Contactor replacement $150–$500 $550 Refrigerant recharge (R-410A) $300–$500 $700 Refrigerant leak: find + repair + recharge $250–$1,500 $1,800 Condenser fan motor $450–$800 $950 Blower motor (ECM) $400–$900 $1,100 Evaporator coil replacement $1,350–$2,600 $3,000 Compressor replacement $1,200–$3,500 $3,800 TXV / expansion valve $450–$900 $1,100 Drain line clearing $100–$400 $500 Thermostat replacement (installed) $150–$600 $700 Labor rate (per hour) $95–$210 $250 A quote outside the right-hand column doesn’t automatically mean something dishonest is happening; a variable-speed system on a Trane Infinity-tier unit genuinely costs more to fix than a basic single-stage system. But it’s the line where a second opinion earns its five minutes. What common AC repairs cost in Houston in 2026, by repair type. Have a number that feels too high? Call (713) 598-2737 for a free second opinion before you approve anything. AC Repair Prices By Component Here’s what drives AC repair prices at the component level, and the failure pattern behind each one. Capacitor replacement: $150–$300 The capacitor is the single most common AC repair in Houston, and the one homeowners most often assume is something catastrophic. It’s a small cylindrical part that gives the compressor and fan motors the electrical jolt they need to start. When it weakens, the outdoor fan won’t spin, the unit hums without starting, or the breaker trips. Houston’s roughly 2,800 annual cooling run-hours cook capacitors faster than almost anywhere else in the country, which is why replacements cluster every May. Installed cost, diagnostic included, runs $150–$300. The bare part itself is only $15–$40 so a quote north of $500 for a capacitor alone is worth a second look. Contactor replacement: $150–$500 The contactor is the electrical switch that tells the outdoor unit to energize. It gets confused with the capacitor often, since both cause a “won’t start” symptom and sit in the same panel. Houston’s frequent power flickers and storm-related surges pit and burn the contacts faster here. Expect $150–$500 installed. Refrigerant recharge (R-410A): $300–$500 A recharge tops off refrigerant the system has lost and refrigerant doesn’t get “used up” the way gas in a car does. If your system is low, it’s leaking somewhere. A straight R-410A top-off runs $300–$500, or about $50–$100 per pound installed. Recharging without finding the leak means paying $300–$900 again next summer for the same problem. Refrigerant leak: find, repair, and recharge: $250–$1,500 This is the actual fix pressure-testing the system, locating the leak, repairing or replacing the leaking part, then recharging. A loose fitting is cheap; a leaking evaporator coil is not. Most residential leak repairs land between $600 and $1,200 all-in. Compressor replacement: $1,200–$3,500 The compressor is the most expensive single-part repair short of full replacement. Cost depends heavily on tonnage and whether the unit is standard or variable-speed. Any compressor quote is worth a repair-or-replace conversation, especially on a unit past ten years old. Evaporator coil replacement: $1,350–$2,600 The indoor coil absorbs heat from your home’s air. Houston’s humidity and salt air for homes near Galveston Bay corrodes coils faster than drier climates. Replacement runs $1,350–$2,600. Blower motor (ECM): $400–$900 Moves cooled air through the ductwork. Older PSC motors are cheaper; modern variable-speed ECM motors cost more but run more efficiently. Installed cost: $400–$900. Condenser fan motor: $450–$800 Spins the fan on the outdoor unit. When it fails, the unit runs but can’t shed heat, which risks the compressor overheating. Replacement: $450–$800. TXV / expansion valve: $450–$900 Meters refrigerant into the evaporator coil. It’s a more common failure on Houston’s high-humidity systems than most cost guides acknowledge, including refrigerant recovery and recharge: $450–$900. Drain line clearing: $100–$400 Houston humidity means your AC pulls gallons of water out of the air daily, and that water drains through a line that clogs with algae over time. A clogged line trips the float switch or, worse, overflows into the ceiling. Clearing it: $100–$400. Thermostat replacement: $150–$600 A basic