HVAC Components We Repair & Replace, Georgetown TX
Motors & Fans
Diagnose and repair indoor blower motor failures, bearing wear, winding failure, and capacitor issues.
Replace failed indoor blower motors, we stock common motors for Carrier, Trane, Lennox, Goodman, and Rheem.
Lubricate blower motor bearings before they fail, catches motors that squeal before they burn out.
Clean blower wheels coated with dust and debris that reduce airflow and strain the motor.
Repair or replace condenser fan motors, outdoor fan failure causes compressor overheating on Georgetown's 100°F days.
Diagnose and repair outdoor condenser fan motor failures, common cause of AC shutdown in peak summer heat.
Replace cracked, bent, or imbalanced outdoor fan blades causing vibration and motor strain.
Capacitors & Contactors
The #1 Georgetown summer repair. Capacitors overheat and fail in sustained 100°F+ heat, fast, affordable fix.
Test capacitors before replacing, an out-of-spec capacitor causes the same symptoms as a failed compressor.
Replace failed run capacitors on compressors and fan motors, the most common summer AC component failure.
Replace start capacitors that provide the extra torque needed to start compressors on hot days.
Install hard start kits on aging compressors to reduce starting current and extend compressor life.
Replace pitted or failed contactors, the relay that connects power to the compressor and condenser fan.
Replace AC contactors with pitted contacts that cause intermittent power to compressor and outdoor fan.
Compressor Service
Diagnose compressor failures, not every compressor problem requires replacement. We test before recommending replacement.
Compressor replacement with full circuit flush, filter drier, evacuation, and recharge, done correctly to protect the new compressor.
Replace discharge mufflers that reduce compressor noise and protect the refrigerant circuit.
Install crankcase heaters to prevent refrigerant migration into compressor oil during cold Texas nights.
Replace failed high-pressure safety switches that protect compressors from dangerously high discharge pressure.
Replace low-pressure safety switches that prevent compressor damage from loss of refrigerant charge.
Furnace Components
Replace failed high-limit switches that shut furnaces down on overheating, essential safety component.
Replace faulty furnace control boards, we test all connected components first to confirm the board is the failure.
Repair or replace fan control switches that govern blower timing in older furnaces without electronic control boards.
Replace fragile silicon carbide or silicon nitride ignitors, the #1 furnace no-heat repair in Georgetown.
Replace or clean flame sensors that fail to detect the burner flame, causing furnace lockout.
Replace failed gas valves that prevent gas flow to burners, verified diagnosis before replacement.
Replace thermocouples on older standing pilot furnaces that fail to keep the pilot lit.
Replace tripped rollout switches, but also diagnose why flames rolled out, as this indicates a serious underlying condition.
Replace failed draft inducer motors in 80%+ efficiency furnaces, failure causes pressure switch trips and no-heat conditions.
Replace failed heating elements in electric furnaces, test all elements and sequencers before partial replacement.
Replace failed sequencers that stagger heating element startup to prevent circuit overload.
Replace cracked or blocked pilot tubing on older standing pilot furnaces and boilers.
Repair standing pilot assembly issues on older furnaces, thermocouple, pilot orifice, and gas valve.
Replace corroded or leaking main gas shutoff valves at HVAC equipment.
Outdoor Unit & Noise Components
Install compressor sound blankets to reduce outdoor unit noise, particularly useful in Georgetown's zero-lot-line neighborhoods.
Replace deteriorated equipment pads and isolation mounts that transmit vibration through slabs and walls.
The Millivolt Signal Behind Standing Pilot Furnaces
A thermocouple is a simple but clever device found on older standing pilot furnaces and water heaters, it's a metal probe positioned directly in the standing pilot flame, and the heat from that flame generates a tiny voltage, typically around 25 to 30 millivolts, through a physical property called the thermoelectric effect, where two dissimilar metals joined together produce voltage when heated. That small voltage is exactly enough to hold open an electromagnetic gas valve, which is what keeps gas flowing to the pilot and main burners as long as the pilot stays lit.
This design is a deliberately fail-safe safety mechanism, if the pilot flame goes out for any reason, the thermocouple cools within seconds, the millivolt signal drops, and the electromagnet in the gas valve releases, shutting off gas flow to prevent it from continuing to fill the area unburned. It's an entirely mechanical, non-electric safety system, which is part of why these older furnaces still function during a power outage, no control board or line voltage is required for the thermocouple and pilot system to work.
Thermocouples fail from a combination of oxidation buildup on the probe tip that insulates it from properly sensing the pilot flame's heat, physical degradation of the metal junction after years of thermal cycling, and simple loose connections at the gas valve terminal where the thermocouple's millivolt signal is delivered. A weak or failing thermocouple typically presents as a pilot that lights fine but goes out again shortly after you release the pilot control knob, since the signal generated isn't strong enough to hold the electromagnet engaged on its own once you stop manually holding the valve open during lighting.
Diagnosis involves testing the thermocouple's millivolt output with a specialized meter while the pilot burns steadily, comparing the reading against the typical 25 to 30 millivolt range, along with checking that the pilot flame itself is properly sized and positioned to fully envelop the thermocouple tip, since a poorly adjusted pilot can starve even a healthy thermocouple of adequate heat. Replacement thermocouples are inexpensive and straightforward to install, matching probe length and connector type to the original, this is one of the more affordable common repairs on the older standing pilot systems still found in a number of Georgetown's established, longer-standing homes.
Frequently Asked Questions, Furnace Thermocouple Replacement
Need a Component Diagnosed or Replaced?
We test before we replace. Most parts are on the truck for same-day service.