Furnace Repair
A furnace not turning on in Parker, CO is a common winter call. The thermostat asks for heat and nothing happens. No hum, no click, no warm air. Many causes are small, but some need a contractor. This page covers the usual reasons and the safe checks you can do first.
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Thermostat. Dead batteries, the wrong mode, or a set point lower than the room.
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Tripped breaker. The furnace circuit in the panel has switched off.
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Furnace power switch. It looks like a light switch near the unit and is easy to bump.
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Blower door switch. If the front panel is loose, a safety switch keeps the furnace off.
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Control board fault. The board runs the startup sequence and can fail with age or a power surge.
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Dirty flame sensor. The furnace starts, lights, then shuts down a few seconds later.
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Set the thermostat to Heat and raise it a few degrees above room temperature.
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Replace the thermostat batteries if the screen is dim or blank.
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Look at the breaker panel and reset the furnace breaker once if it has tripped.
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Make sure the furnace power switch is on.
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Check that the furnace front panel is fully seated.
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Look at the filter. A badly clogged filter can make the furnace shut itself off.
Call if the breaker trips again, if you see a blinking error light, or if the furnace clicks but never lights. Those point to parts like the control board or flame sensor. In a Parker, Colorado cold snap, a house can lose heat quickly, so it is better not to wait overnight.
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You call the line and describe what the system is doing.
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Your call goes to an independent local HVAC contractor who serves Parker.
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The contractor asks a few questions and sets up a visit that suits you.
The thermostat may be sending a signal the furnace never receives. A tripped breaker, an off power switch, a loose panel, or a failed control board can all cause this. If the simple checks do not help, a contractor can test the circuit.
Yes. A clogged filter can overheat the furnace and trip its limit switch. The furnace may then refuse to run or shut off soon after starting. Replacing the filter is the first thing to try.
Reset it once. If it trips again, leave it off and call. A breaker that keeps tripping is a sign of an electrical fault that needs a contractor.
If your furnace still will not start after these checks, call (303) 647-3227. We connect you with an independent local HVAC contractor who works on furnaces in Parker.
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