- Licensed TACLA72152E
- 77375 and 77377
Furnace Repair in Tomball, TX Gas or Electric, We Carry Both
- $89 Diagnostic, Credited
- Gas and Heat Pump Parts Stocked
- Harris County
Same-day furnace repair across Tomball, 77375 and 77377
75 Degree AC repairs furnaces and heat pumps in Tomball, Texas, covering 77375 and 77377 across Harris County. The diagnostic is $89 and it comes off the repair once you approve it. Licence TACLA72152E, verifiable through the Texas Department of Licensing and Regulation.
Call (713) 598-2737. Tomball sits at the north edge of the metro and it gets colder here than the rest of Houston, which is measurable rather than a figure of speech.
Tomball is the coldest place in the Houston metro, and it is not close
The nearest weather station to Tomball is Houston Hooks Memorial, NOAA station USW00053910, about six and a half kilometres from the middle of town. Every other page written about Houston heating quietly uses the airport out at Bush or Hobby. Neither is close to here, and neither is as cold.
| Station | Distance from Tomball | Annual heating demand | Annual cooling demand |
|---|---|---|---|
| Hooks Memorial (Tomball) | ~6.6 km | 1,580 | 2,745 |
| Bush Intercontinental | ~19 km | 1,367 | 3,157 |
| Sugar Land Regional | ~55 km | 1,421 | 2,938 |
| Hobby | ~55 km | 1,220 | 3,144 |
*NOAA climate normals, heating and cooling degree days.*
The two columns together are the interesting part. Tomball carries 29% more heating demand than Hobby and 16% more than Bush, and at the same time it has the lowest cooling demand of the four. Measured against cooling, heating matters roughly 48% more here than it does on the south side of Houston.
None of that makes Tomball cold in any absolute sense. It is still the Gulf Coast. What it means practically is that a Tomball furnace gets asked to work more often, and more hours, than the same furnace twenty miles south, and it will show its age sooner.
Half of Tomball heats with gas and half with electricity
This is the part almost nobody gets right about this town. Census figures put Tomball at 2,587 households on utility gas and 2,578 on electricity. Out of 5,213 occupied homes, the two camps are nine households apart.
| Place | Utility gas | Electricity |
|---|---|---|
| Tomball | 49.6% | 49.5% |
| Harris County | 42.2% | 55.4% |
| City of Houston | 33.7% | 63.9% |
| Sugar Land | 68.7% | 29.5% |
*ACS 2024 5-year, table B25040.*
Everywhere else in this metro you can make a decent guess. Sugar Land is gas country. Inside Houston proper, nearly two thirds of homes run electric. Tomball is a coin flip.
That matters more than it sounds. A gas furnace and a heat pump are not two versions of the same appliance. They fail differently, they need different parts, and almost nothing crosses over between them. So when somebody in Tomball calls and says the heat is not working, the honest first question is not what is wrong. It is what have you got.
Gas furnace, heat pump or electric air handler: what breaks and what we carry
The short version before the table. If you are on gas, your no-heat call is usually about lighting the burner. If you are on a heat pump, it is usually about the machine getting confused between heating and cooling. If you are on electric resistance heat, it is usually a heating element or the switch that stages it.
| Gas furnace | Heat pump | Electric air handler | |
|---|---|---|---|
| Share of Tomball | most of the 49.6% on gas | part of the 49.5% electric | part of the 49.5% electric |
| Usual no-heat cause | ignition: thermocouple, flame sensor, gas valve | reversing valve or defrost board | heating element or sequencer |
| What it cannot be | no reversing valve, no defrost cycle | no flue, no combustion air | no flue, no refrigerant |
| Safety item that matters | flue draft and combustion air | nothing of that kind | breaker and wire sizing |
| Behaviour in a cold snap | full output at any outdoor temperature | output drops as it gets colder | full output, heavy current draw |
75 Degree AC carries ignition parts and defrost boards on the same truck, because in this town the next call could be either one. Find your column and read across it. If you genuinely do not know which one you own, that is normal in this town, and it takes about two minutes to establish.
The first thing we do is work out which of the two you own
Not a formality. In a city split down the middle it is the step that decides everything after it, and getting it wrong wastes a visit.
- Look for a flue. A gas furnace vents combustion gases outside through a metal pipe. No pipe, no gas furnace. This alone settles most calls in under a minute.
- Check whether the outdoor unit runs in winter. If the outside condenser spins when you call for heat, you have a heat pump. A gas furnace leaves that unit asleep all winter.
- Find the gas line at the cabinet. A black iron pipe with a shutoff valve running into the equipment means gas. An electric air handler has conduit instead.
- Read the data plate. Model and serial tell us the fuel, the capacity, the year, and whether parts still exist for it.
- Then diagnose. Only now is it worth measuring anything, because until this point we would be guessing at which fault list applies.
We do this on the phone when we can. It takes two minutes and it means the right parts are already on the van.
What we find when a Tomball gas furnace stops
A gas furnace makes heat by burning something, so almost every no-heat fault is somewhere in the sequence of proving it is safe to light, lighting it, and confirming it lit. That sequence is where things break.
- A dirty or failed flame sensor. The burner lights, runs a few seconds, then shuts down. It repeats and gives up. This is the single most common gas no-heat call we take, and it is often a cleaning rather than a part.
- A worn thermocouple or ignitor. Older units use a thermocouple, newer ones a hot surface ignitor. Either one fails and nothing lights at all.
- A gas valve that will not open. Less common, more expensive, and worth a second opinion before anyone replaces one.
- A seized inducer motor. The furnace has to prove it can pull exhaust out before it will light. A dead inducer means it never tries, and you get a click and silence.
- Blocked combustion air or a bad flue draft. This is the one that is genuinely a safety issue rather than a comfort issue. Bird nests, crushed flex, a vent pipe that has separated in an attic.
- A cracked heat exchanger. Uncommon, and not a repair. If we find one we shut the system down and tell you plainly.
75 Degree AC measures flue draft on every gas call, not only when someone reports a smell.
What we find when a Tomball heat pump stops heating
A heat pump does not make heat. It moves it, by running the air conditioner backwards. So its failure list has nothing to do with burners and everything to do with whether the machine can reverse itself and keep frost off the outdoor coil.
- A stuck reversing valve. The valve that flips the system between cooling and heating. When it sticks, you get air conditioning in December. Unmistakable once you know the symptom.
- A failed defrost board or sensor. The outdoor coil ices up in cold damp weather and the board is supposed to melt it off periodically. When that logic dies, the coil turns into a block of ice and capacity collapses.
- A bad contactor or capacitor. The outdoor unit hums or does nothing. Same parts that fail in summer, different consequence.
- Low refrigerant charge. A heat pump low on refrigerant limps in cooling and fails badly in heating, because winter is when it has the least to work with.
- Backup heat that never engages. Most Tomball heat pumps have electric elements for the cold nights. If those are dead you will not notice until the temperature drops, which is exactly when you need them.
A heat pump that runs all night in a cold snap is usually not broken
Worth saying plainly, because it generates a lot of calls in January and a fair number of unnecessary quotes.
A heat pump pulls warmth out of outdoor air. The colder that air gets, the less there is to pull, so output falls exactly as your need for it rises. On a genuinely cold Tomball night a healthy heat pump will run more or less continuously and hold the house a couple of degrees below the setpoint. That is the machine working at the edge of what it can do, not a fault.
It also runs a defrost cycle every so often, which sounds alarming the first time. The outdoor fan stops, you may hear a thump as the valve reverses, and steam comes off the coil. Two to ten minutes, then it goes back to heating. Nothing is wrong.
What is not normal: ice that never clears, air from the vents that is cool rather than warm, or a system that trips a breaker. Those are faults, and worth a call. The reason we spell this out on a Tomball page rather than a general one is that systems here hit that edge more often than the same equipment would in Pearland or Clear Lake.
What furnace repair costs in Tomball, by symptom
75 Degree AC charges a flat $89 to diagnose a heating fault in Tomball and credits that $89 against the repair once you approve it. You do not pay twice to learn what is wrong.
| Symptom | Likely cause | Typical repair range |
|---|---|---|
| Lights, runs briefly, shuts off | Flame sensor clean or replace | $150 to $350 |
| Nothing lights at all | Ignitor or thermocouple | $180 to $420 |
| Click, then silence | Inducer motor | $350 to $850 |
| Blower runs, air stays cool (gas) | Gas valve or control board | $300 to $900 |
| Air conditioning in winter | Reversing valve or solenoid | $350 to $1,100 |
| Outdoor coil iced solid | Defrost board or sensor | $250 to $650 |
| Outdoor unit hums, will not start | Capacitor or contactor | $180 to $450 |
| Runs constantly, never quite warm | Charge, airflow, or nothing at all | diagnostic first |
Parts and labour on a standard visit. After-hours costs more and we say so on the phone rather than on the invoice.
Tomball's houses are newer than Harris County's, and that changes the maths
Most HVAC copy written for this region assumes tired old housing. In Tomball that is simply not true. The median Tomball home was built in 1994, against 1988 for Harris County and 1982 for the City of Houston. Tomball is six years newer than its own county and twelve years newer than Houston proper. Around 58% of it is detached single-family housing.
Newer stock changes the repair-or-replace conversation in a specific way. A lot of these houses are on their first or second system rather than their fourth, ductwork was sized for equipment that is still roughly the equipment in place, and the cheap fix is more often the right fix. We are not going to pretend a 2005 system needs replacing because it would be a bigger invoice.
Where age does bite is the parts supply. Control boards and proprietary valves for some late-1990s and early-2000s models are getting hard to source, and that shortens the sensible life of an otherwise sound furnace. 75 Degree AC will tell you if yours is one of those before you spend money on it.
Repair or replace?
Repair, in most Tomball houses, if the system is under twelve years old and the quote comes in under roughly a third of replacement cost. Replace if it is past fifteen, or if the fault is a cracked exchanger. Between those two the arithmetic is close and depends on what else is worn.
- Under 12 years, one clear fault: repair. Almost always the cheaper decade.
- 12 to 15 years, second repair in two winters: get both numbers and compare them honestly.
- Over 15 years, or a cracked exchanger: replace. A crack is a safety condition, not a repair item.
- Parts no longer manufactured: replace, whatever the age says.
- Heat pump that cannot hold the house on a cold night: check the charge and the backup heat before anyone quotes equipment. This is frequently a repair being sold as a replacement.
CenterPoint rebates of $300 to $750 apply to qualifying replacements. The federal 25C credit expired on 31 December 2025 and is gone, whatever an older article still says. SEER2 minimum in this region is 14.3, and 16 or better is worth the money here given the cooling season.
What a Tomball furnace tune-up actually includes
Tune-up means very little as a word, so here is the scope. On a gas system: burners inspected and cleaned, flame sensor cleaned, ignitor checked, gas pressure verified against the data plate, temperature rise measured across the exchanger and compared to spec, flue draft tested, safeties and limit switches confirmed working, filter and blower checked.
On a heat pump: reversing valve operation confirmed in both modes, defrost cycle forced and watched through, refrigerant pressures read, backup heat elements confirmed to energise, contactor and capacitor tested under load, coil condition checked.
Two things we write down and hand over either way: temperature rise and static pressure. Those two numbers are how you tell whether a system is actually right or merely running, and most people have never been shown them.
The case for doing this in autumn rather than January is not exciting. A system that sat idle since February tends to reveal its fault on the first cold night, at the same time as everybody else’s, and parts are hardest to get that week. Some years the front comes late and none of it matters.
Who pulls the permit on a furnace replacement in Tomball
A repair does not need a permit. A replacement generally does, and the licensed contractor pulls it. That is our job, not yours.
Where people get confused is jurisdiction, because Tomball is a small incorporated city surrounded by unincorporated Harris County, and the two are not the same office. Inside the city limits, the City of Tomball’s building department handles it. Outside them, it is the Harris County Engineering Department’s Permits Office.
One myth worth killing: unincorporated Harris County is not a code-free zone. The county has required residential building permits for single-family and duplex homes since 1 September 2009 and runs an inspection programme for them. If a contractor tells you no permit is needed out past the city line because the county does not care, that is wrong, and it is a reasonable signal to get another quote.
Tomball neighborhoods and ZIP codes we cover
75 Degree AC covers 77375 and 77377, and unlike most of the cities we serve, Tomball sits entirely within one county. There is no Harris-versus-Fort Bend question here and no split jurisdiction to work around.
| Area | What it covers |
|---|---|
| 77375 | Tomball proper and most of the surrounding subdivisions |
| 77377 | The Tomball addresses out toward Pinehurst |
| Harris County | The whole city. Tomball sits in one county, not two |
Areas we work in regularly:
- Old Town Tomball and the streets around Main and Market
- The subdivisions along FM 2920 and SH 249, the Tomball Tollway corridor
- Theiss and the neighbourhoods toward Klein
- The newer building out toward Pinehurst and the Montgomery County line
- The acreage lots north and west of town, where drive time is the only real difference
Adjacent coverage: AC repair in Tomball for the cooling half of the same system · HVAC repair in Cypress to the south · our Tomball HVAC overview.
Tomball calls dispatch on (713) 598-2737. The drive does not change the rate.
Furnace and heating brands we repair in Tomball
75 Degree AC repairs Trane, Carrier, Lennox, Goodman, Rheem, Daikin, York and American Standard heating equipment, and stocks the common failure parts for all of them. Gas furnaces, heat pumps, dual-fuel systems and packaged units.
On a repair, the badge on the cabinet is close to the least useful thing about your system. What decides the outcome is whether the specific part is still being manufactured, and in a town split evenly between two kinds of heat, whether the truck that shows up is carrying the right half of the inventory.
Heat pumps add one more variable, which is whether the outdoor unit was ever properly matched to the indoor coil and the backup heat sized to go with it. A mismatch is invisible for years. It surfaces on the coldest night, which in Tomball arrives earlier and harder than it does south of the city.
Frequently asked questions: furnace repair in Tomball
Fourteen questions, taken from live People Also Ask data on this query, from the site’s own Search Console record, and from what people actually ask on a Tomball heating call. None invented. Several are about telling a gas furnace from a heat pump, which is the practical question in a city that splits almost exactly down the middle.
Rising repair frequency is the clearest one. Two repairs in two winters on a system over twelve years old usually means more are coming. Others: rust or soot at the cabinet, a burner flame that is yellow rather than blue, rooms that never catch up, a blower that runs constantly, and noises that are new. A cracked heat exchanger ends the conversation regardless of age.
Look for a flue pipe venting outside, and watch whether the outdoor unit runs when you call for heat. Flue plus a still outdoor unit means gas. A spinning outdoor unit in winter means a heat pump. In Tomball it is genuinely a coin flip, so this is worth two minutes before anyone quotes you.
Yes, measurably. The nearest NOAA station, Hooks Memorial, records the highest annual heating demand of any station in the metro, about 29% more than Hobby and 16% more than Bush Intercontinental, along with the lowest cooling demand of the four. It is still the Gulf Coast, but your furnace works more here than it would twenty miles south.
Because the builder changed suppliers. Tomball splits almost exactly in half between gas and electric heat, and the line often runs between subdivisions built a year apart, sometimes between houses on the same street. It means your neighbour’s advice about their repair may have nothing to do with your system.
Yes. 75 Degree AC stocks ignition parts and defrost boards on the same truck, because in a city divided this evenly the next call could be either. It is the main reason we can usually finish a Tomball heating repair on the first visit.
Most heat pump heating repairs land between $180 and $650. A capacitor or contactor sits at the low end, a defrost board in the middle, a reversing valve at the top and occasionally beyond. The $89 diagnostic tells you which before you commit, and it comes off the repair.
Fifteen to twenty years for a gas furnace, ten to fifteen for a heat pump, longer for electric resistance heat because it does so little work. Heat pumps run year-round here, which is why they wear faster than a furnace that only works a few weeks a year.
Under ten years and you should expect repairs to be minor. Ten to fifteen is the decision zone. Past fifteen, budget for replacement even while it still runs. Tomball’s median build year is 1994, so a fair number of houses here are on a second system now rather than an original one.
Most 2,000 square foot Tomball houses land between $6,500 and $13,000 installed, depending on whether it is a furnace and coil or a full heat pump system, the efficiency tier, and whether the ductwork needs attention. We quote after measuring static pressure, not off square footage.
Unlikely. Equipment prices rose through 2025 and 2026 on the refrigerant change from R-410A to R-454B and on efficiency minimums. Repair parts have moved much less. If your system is under twelve years old, waiting costs you nothing.
Yes. 75 Degree AC charges $89 to find the fault and credits the full $89 against the repair once you approve it.
Usually, and in Tomball specifically the answer depends on the week rather than the day. The first hard cold front of the season is our busiest stretch of the year. Call early on those days.
For a replacement, generally yes, and 75 Degree AC pulls it. Inside the city limits that goes through the City of Tomball. Outside them it goes through the Harris County Permits Office, which has required residential permits since 2009. A repair does not need one.
Yes. 75 Degree AC holds Texas licence TACLA72152E, verifiable through the Texas Department of Licensing and Regulation, and carries liability and workers’ compensation coverage. Tomball is entirely within Harris County, and we are licensed for work throughout it.
Same-day furnace repair in Tomball: (713) 598-2737
75 Degree AC repairs gas furnaces and heat pumps across Tomball, in 77375 and 77377. Gas or electric, we carry parts for both, because here it is close to even. $89 to find the fault, credited to the repair, with the temperature rise and static pressure written down and handed to you.
Call (713) 598-2737 or book online.