Thermostat & Controls Services, Georgetown TX
Thermostat Installation & Service
Install any thermostat, standard, programmable, or smart, with proper wiring, configuration, and testing.
Replace faulty or outdated thermostats. We identify compatibility requirements before recommending equipment.
Recalibrate thermostats reading inaccurately, a 2-3°F offset causes significant comfort and efficiency problems in Georgetown's heat.
Determine if the thermostat or the system is the cause of HVAC problems, the thermostat is rarely the actual culprit.
Relocate thermostats away from heat sources, drafts, or direct sunlight that cause inaccurate temperature readings.
Install a common wire for smart thermostats that require continuous 24V power, without it, smart thermostats often malfunction.
Full smart thermostat setup including wiring, app configuration, scheduling, and compatibility verification.
Optimize thermostat response settings, anticipator adjustment, and stage sequencing for your specific system.
HVAC Electrical Diagnostics & Repair
Systematic low-voltage and line-voltage electrical diagnosis, find faults without replacing working components.
Repair damaged, corroded, or incorrectly wired HVAC control and power circuits.
Diagnose and repair HVAC power supply issues, breakers, disconnects, and line-voltage components.
Correct overcurrent or undersized circuit conditions causing tripped breakers or component damage.
Recover HVAC systems stuck in lockout, error states, or post-power-surge conditions.
Trace and repair 24V control circuit faults, shorts, opens, and incorrect wiring between thermostat and equipment.
Repair or replace outdoor AC disconnect boxes, fuses, and weatherhead connections.
Replace deteriorated flexible conduit and wiring connections at outdoor AC units.
HVAC Control Components
Diagnose and repair HVAC control system failures including boards, relays, and communication wiring.
Full system calibration, thermostat, controls, and equipment operating parameters aligned and verified.
Calibrate system staging, fan delays, and operating behavior for your specific comfort and efficiency goals.
Calibrate control signals between thermostat and equipment, staging, modulation, and communication signals.
Replace failed 24V control transformers, the power supply for the entire low-voltage control circuit.
Replace failed relay boards that control equipment staging and multi-zone operation.
Install safety disconnect switches for code compliance and service safety on HVAC equipment.
Replace aquastat controls on hydronic and boiler systems that regulate water temperature.
Install and configure zone control panels for multi-zone HVAC systems.
Install outdoor temperature sensors for weather-compensating controls and smart thermostat systems.
Fixing Line Voltage Power Delivery Problems
Power supply issues sit upstream of the equipment's own controls, involving the breaker panel, the disconnect, the contactor, and the wiring that delivers line voltage to the compressor, blower motor, and other line voltage components. These problems are distinct from control circuit faults because they affect whether the equipment gets power at all, rather than whether it's told correctly what to do with the power it has.
Contactor failure is one of the most common power supply issues we repair. The contactor is the relay that switches line voltage to the compressor and outdoor fan motor, and its contacts pit and burn from the arc created every time they open under load, eventually failing to close, welding shut, or closing with enough resistance to generate damaging heat. A contactor that's chattering, humming loudly, or showing visible pitting on its contacts is a failure in progress rather than something to wait out, since a welded contactor keeps the compressor running continuously even after the thermostat satisfies, which is both a comfort problem and a real risk of compressor damage from short cycling on restart.
Breaker related issues range from a simple worn breaker that trips below its rated current, which we test by checking actual amp draw against the breaker's rating, to a breaker that's the wrong size entirely for the circuit it protects. We also find failures at the disconnect and at wire splices along the run, particularly in older Georgetown homes where aluminum branch wiring, common in construction from the 1960s and 70s, requires specific anti-oxidant compound and compatible connectors at every splice or it develops high resistance connections over time regardless of how new the equipment attached to it is.
Our repair approach always confirms actual voltage is present and stable at each point in the circuit, panel, disconnect, contactor, and equipment terminal, rather than assuming power delivery is fine just because the breaker hasn't tripped. A breaker that hasn't tripped can still be feeding a circuit with significant voltage drop from a failing connection somewhere along the path, and finding that connection before it fails completely, often during a routine repair visit for an unrelated symptom, prevents a no-cool emergency call during the next heat wave.
Frequently Asked Questions, HVAC Power Supply Repair
HVAC Electrical or Thermostat Issue?
We trace faults to the actual source, not replace parts until something works.