Thermostat wiring is the most common source of failures we see. Our contractors check every wire, test voltage, and verify the transformer before making a repair. C-wire installation is handled on the spot when needed for smart thermostat compatibility.
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- 24/7 Emergency Service
Thermostat Repair and Installation in Houston, TX - Expert Service for Every System
75 Degree AC delivers thermostat repair and installation in Houston TX for smart thermostats, programmable thermostats, wifi thermostats, and every residential model. Our trusted contractors diagnose wiring faults, replace failing units, install new smart thermostats, and make sure the system communicates properly with your heating and cooling equipment.
- Emergency Appointments Available
- Home & Commercial
- Easy Scheduling
About us
Trusted Thermostat Service From Licensed Houston Contractors
Thermostat issues are one of the most common service calls 75 Degree AC handles across Houston. Our contractors work on every type, from basic digital thermostats to Nest, Ecobee, and Honeywell smart models. Most thermostat problems come down to wiring, compatibility, or a unit that has simply stopped responding. That hands-on experience with thermostat repair and installation helps us find the cause quickly instead of guessing. Every thermostat job starts with a wiring and voltage check to confirm what the system needs before anything is replaced. When a repair is all that is needed, the fix is completed and tested. When replacement makes more sense, we explain why and walk the homeowner through the options. The price is set before any work begins and does not change once the job starts. Our thermostat repair and installation service in Houston is backed by fully licensed and insured contractors. We carry common thermostat models and C-wire adapters on the truck so most jobs are completed in a single visit. Same-day availability is offered for homeowners dealing with a system that will not turn on or respond to temperature changes.
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Experience
25+
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Roberto Ramon
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Professional HVAC Services in Houston TX by a Local HVAC Contractor
01
Gas Furnace Install
Most Houston homes run on natural gas for heating. Our gas furnace installation service includes gas line connection.
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02
Electric Furnace Install
Homes without access to natural gas rely on electric furnaces for heat.
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03
High-Efficiency Furnace
A condensing furnace captures additional heat through a secondary heat exchanger.
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04
Furnace and Ductwork
Some installations require ductwork changes to support the new furnace.
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What Customers Say About Our Service
Expert Thermostat Repair and Installation Services We Provide in Houston, TX
Thermostat Repair
When a thermostat goes blank, shows the wrong temperature, or stops communicating with the HVAC system, our thermostat repair service starts with a full wiring and voltage check. We test the transformer, relay, and sensor to find the exact fault before making any repair.
Thermostat Replacement
Older thermostats that are beyond repair or no longer compatible with the HVAC system are replaced with a properly matched new unit. Our thermostat replacement service includes removing the old thermostat, labeling existing wires, installing the new unit, and running a full system test in both heating and cooling modes.
Smart Thermostat Install
Upgrading to a Nest, Ecobee, or Honeywell smart thermostat gives homeowners wifi control, energy scheduling, and app-based temperature management. Our smart thermostat installation service includes compatibility verification, C-wire installation when needed, wifi setup, and app configuration so the system is fully operational before we leave.
Thermostat Wiring
Wiring problems are behind many thermostat failures. Our thermostat wiring service covers C-wire installation, wire labeling, voltage testing, and transformer replacement. We make sure every connection between the thermostat and the HVAC system is correct and secure.
Thermostat Upgrade
Moving from a manual or basic digital thermostat to a programmable or smart model improves comfort control and lowers energy use. Our thermostat upgrade service includes selecting a compatible model, removing the old unit, installing and configuring the new one, and setting up an energy schedule tailored to the homeowner's routine.
What Customers Say About Our Service
Why 75 Degree AC Is Houston's Choice for Thermostat Services
When you need thermostat repair and installation in Houston, 75 Degree AC brings the right tools and knowledge to every call.
Every Brand Covered
We work on Nest, Ecobee, Honeywell, Emerson Sensi, Carrier, Trane, Lennox, and every other residential thermostat brand. From a basic digital model to a full smart home thermostat, our contractors have worked on it.
Honest Repair Guidance
When a thermostat can be repaired for less than the cost of replacement, we repair it. When replacement is the better option, we explain why and present choices that fit the home and the budget. The decision is always the homeowner's.
Same-Day Availability
A thermostat that stops A thermostat that stops working leaves the entire HVAC system offline. Our contractors offer same-day thermostat service across Houston. Common thermostats and C-wire adapters are stocked on the truck so most jobs are completed in one visit.
Get Your Thermostat Fixed or Replaced
Call (713) 598-2737 to schedule thermostat service with a licensed Houston HVAC contractor. Free estimates and same-day appointments are available across the metro.
How Our Thermostat Repair and Installation Process Works in Houston
75 Degree AC follows the same structured process on every thermostat repair and installation call in Houston, from the first check to the final test.
Check the Current Setup
Our contractors inspect the existing thermostat, check the model, and review the wiring connections. The HVAC system type is confirmed to make sure any repair or replacement is compatible with the equipment.
Test Wiring and Voltage
Every wire is tested for continuity and correct voltage. The transformer and relay are checked. This step catches wiring faults, blown fuses, and missing C-wires before any parts are replaced.
Repair or Replace Decision
Based on the test results, our contractors explain what failed and when a repair or replacement makes more sense. The price is given before any work starts and does not change.
Install and Configure
The repaired or new thermostat is mounted, wired, and connected to the HVAC system. Smart thermostats get full wifi setup, app pairing, and schedule programming. The homeowner is walked through the controls.
System Test Both Modes
The HVAC system is tested in both heating and cooling modes to confirm the thermostat is controlling the equipment correctly. Temperature response, fan operation, and cycle timing are all verified before the job is closed out.
Our Recent Projects in Houston
How Your Thermostat Controls Heating and Cooling in Houston
The thermostat is the control center for your entire HVAC system. When the room temperature drops below the set point, the thermostat signals the furnace or heat pump to start a heating cycle. When the temperature rises above the set point, it signals the air conditioner or heat pump to start cooling. The thermostat also controls the blower fan, manages equipment staging on two-stage or variable speed systems, and handles auto changeover between heating and cooling modes on dual-mode setups.
Smart and programmable thermostats add energy scheduling, which lets the homeowner set different temperatures for different times of day. In Houston, where the cooling season runs for most of the year, a properly programmed thermostat can lower utility bills by reducing run time when the home is empty. Our contractors at 75 Degree AC make sure every thermostat we install is configured to work with the specific HVAC system in the home, not just mounted on the wall.
What Parts Of Houston Does 75 Degree AC Serve?
75 Degree AC provides premium HVAC services across Houston, TX, supporting residential and light commercial properties throughout the city. Our service coverage reflects how HVAC demand actually works in Houston, from central neighborhoods to outer city districts. Customers rely on us for consistent service standards, clear communication, and dependable system support city-wide.
Downtown
East Downtown (EaDo)
Westwood
Midtown
Spring Branch (Central, TX)
University Place
Montrose
Gulfton
Meyerland
The Heights
Westbury
Eastwood
River Oaks
Memorial
Harrisburg / Manchester
Third Ward
Lazybrook / Timbergrove
Spring Branch (East Houston)
South Belt / Ellington
Trinity / Houston Gardens
Clear Lake (Houston City Portion)
Richmond