Thermostat & Control Troubleshooting

Fix mis-wired thermostats, resolve short cycling, and integrate smart controls with your HVAC system.

HVAC Services 1 – 1.5 hours $99 Serving Phoenix Metro, Coolidge & Casa Grande
Thermostat Troubleshooting

What This Service Includes

Thermostat problems can mimic serious HVAC failures, but they're often simple to fix once properly diagnosed. We troubleshoot wiring, configuration, and compatibility issues to restore reliable control.

  • Verify thermostat wiring and connections
  • Test voltage and signal continuity
  • Check C-wire (common wire) availability for smart thermostats
  • Diagnose short cycling and temperature swing issues
  • Verify compatibility with HVAC equipment
  • Configure heat/cool changeover settings
  • Program schedules and temperature limits
  • Integrate with smart home systems (Alexa, Google, Home Assistant)
  • Test full heating and cooling cycles
  • Provide training on thermostat operation

Common Thermostat Issues We Solve

  • Short cycling: system turns on and off too frequently, often from wrong anticipator setting or bad location
  • Won't control heating/cooling: mis-wired or incompatible with equipment type
  • No C-wire for smart thermostat: need to add common wire or install adapter
  • Temperature swings: overshooting setpoint by 3-5 degrees
  • Smart features don't work: WiFi issues, app problems, or configuration errors
  • Fan won't turn off: stuck relay or wrong fan mode setting
  • Blank screen/no power: blown fuse, dead batteries, or wiring problem

Smart Thermostat Integration

With our smart home expertise, we go beyond basic thermostat installation. We can integrate your HVAC controls with:

  • Voice assistants: Alexa, Google Assistant, Siri
  • Home automation: Home Assistant, SmartThings, Hubitat
  • Schedules and scenes: coordinate with lighting, occupancy, and time of day
  • Remote access: control from anywhere via smartphone
  • Energy monitoring: track usage and optimize settings

C-Wire Solutions

Many older HVAC systems lack a C-wire (common wire) needed to power smart thermostats. We can:

  • Run a new C-wire from your air handler
  • Install a C-wire adapter at the air handler
  • Use existing unused wires for C-wire function
  • Recommend alternative power solutions for your specific setup

Thermostat Placement

Poor thermostat location causes constant problems. We assess whether your thermostat is in a good spot or if relocation would improve performance. Bad locations include: direct sunlight, near doors/windows, above vents, in hallways nobody uses, or near kitchens.

Pricing

  • Thermostat troubleshooting: $99
  • C-wire installation: +$79-$149 depending on accessibility
  • Thermostat relocation: +$129 (includes new wire run and patching)
  • Smart home integration: included with troubleshooting

New Thermostat Installation

If you want to upgrade to a smart thermostat, see our Smart Thermostat Installation service for complete setup including device purchase assistance, installation, and full integration.