Heating and Furnace Repair in Athens and Cleveland, TN
Giles Heating and Air repairs gas furnaces, propane furnaces, heat pumps, electric furnaces and gas package units for homes and businesses in Athens, Cleveland and the surrounding counties. We prioritize no-heat calls, diagnose quickly, and quote the repair before starting. We are experienced with older systems and with the carbon monoxide safety checks gas equipment needs.

When to call for heating repair
- Furnace will not turn on, or turns on and shuts off after a few seconds
- Blowing cold or lukewarm air
- Burner flame is yellow or orange instead of blue
- Smell of gas, or a burning smell that does not clear after the first cycle
- Heat pump stuck in defrost, or outdoor unit iced over for hours
- Thermostat calling for heat but nothing happens
- Carbon monoxide detector going off (leave the house first, then call)
- Loud bang or boom when the burner lights
- Sharp increase in the gas or electric bill
What breaks on furnaces and heat pumps here
Ignitors and flame sensors.On gas furnaces these two parts cause most "it clicks but won't light" or "it lights then shuts off" calls. A flame sensor cleaning is often all it takes.
Limit switches and pressure switches.Safety controls that shut the furnace down when something is off. Sometimes the switch failed, sometimes it is doing its job and telling us about a blocked vent or a bad blower.
Blower motors and capacitors.Same parts as an AC, same quick fixes most of the time.
Heat exchangers.A cracked heat exchanger can leak carbon monoxide into the house. We inspect them on every gas furnace service. If one is cracked, the furnace gets replaced, not patched. That is not an upsell, it is the only safe answer.
Heat pump defrost boards and reversing valves.Heat pumps do most of the winter work in East Tennessee, and the defrost cycle is where they usually act up.
Gas valves and thermocouples on older units and gas logs.


Gas furnace safety
We service natural gas and propane furnaces and package units of every brand. Every gas repair includes a check of the burners, the orifices and the heat exchanger. If you have never had a carbon monoxide detector installed near your bedrooms, get one. It costs less than a service call.
Gas furnace and gas unit service →Keeping older systems going
Not everyone is ready to spend on a new system, and we do not push it. One customer had us keep a 29-year-old unit running until they were ready for a full replacement, and then we moved the new system to the attic and cleaned up the basement. If the numbers say replace, we will show you the numbers. If they say repair, we repair.
No-heat calls in winter
Cold nights here are short but they are cold. We keep extended hours seven days a week and move no-heat calls ahead of routine work. Space heaters are fine for a night; a furnace that will not run is not something to live with for a week.
Common questions
My furnace clicks but will not light. What is wrong?
Usually the ignitor or the flame sensor. Both are quick repairs. Occasionally it is the gas valve or a safety switch.
Why does my heat pump blow cool air in winter?
Heat pump air feels cooler than furnace air even when it is working correctly. If the house is not warming up, the outdoor unit may be iced over, low on refrigerant, or stuck in defrost. We can check it.
Is it safe to run a furnace that smells like gas?
No. Turn it off, leave the house, and call the gas company or us from outside.
Can you repair propane furnaces?
Yes. We service both natural gas and propane equipment.
How long does a furnace repair take?
Most common repairs are done in under an hour once the technician is on site.
Do you repair furnaces in mobile homes?
Yes, including package units and downflow furnaces.
