Question about Heating & Cooling
I have have a YORK central air/ heat unit that is not firing up. Thermostats seem to be working but they aren't turning the heat system on. Background info: I had a lightning strike this summer that took out the circuit board. Certified technician replaced the whole board. The A/C worked all summer but now the heat isn't working. Please help, my family is cold and I don't have money to pay again.
If the stack blower (fan) does not start when you select heat, the fan control may be defective. If the igniter does not heat up long enough to cause the thermocouple to open the gas valve and fire the burner, the igniter is defective. If the igniter heats long enough but the burner doesn't fire up, the thermocouple is defective.
Posted on Nov 26, 2013
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Posted on Jan 02, 2017
The blower motor kicks on when there has been a 24 volt control failure.
This usually means that a limit switch has tripped.
Most likely that would be a high temp limit switch or a rollout switch.
First, make sure the filters are clean. and the evap coil is clean. If eaither are dirty/clogged, it will partially block airflow, causing the furnace to overheat, causing the high temp limit to trip.
A rollout switch typically trips for three reasons.
1 flame rollout into the burner compartment due to poor airflow.
2 overheating af teh metal plate the rollout is mounted to, due to dirty, old, rusted components.
3 a bad limit switch.
If your unit has an LED light, count the flashes and it will hepl popint out the problem.
(locate the wiring diagram/flash code list, and correspond the flash count, with the code.)
First, check filters.
Posted on Jan 14, 2009
sounds like you have short in the low voltge side of the electrical circuit. I would check the thermostat wires outside at the condenser. look for any bare or exposed wires from where the wire comes from the house to the condenser. the thermostat wire will be a brown wire that is run on the outside which sends a signal to the contactor to make the condenser work. common cause his rodents or happens when weed whacking around condenser. Hope this get you started.
Posted on Apr 26, 2009
First check to see if your outside unit is working and you can here the compressor running. If the fan runs and the compressor does not you have a problem with the capacitor or wires burnt off terminals. If your not sure you know how to work on this please call a service tech ask for free estimate. If the unit compressor and fan runs you may be out of gas that meanns you have a leak. Either way you need a service tech. You can only go so far without the correct tools to work with. Russ
Posted on Jul 22, 2009
IF YOU ARE NOT ELECTRICALY EXSPERIANCED I WOULD FIND SOME ONE YOU KNOW TO CHECK THE FULL LOAD AMPS ONE THE UNIT AND USE AN AMPROBE TO CHECK AND SEE WHAT AMPS ARE BEING DRAWN. SOUNDS LIKE YOU MAY HAVE A WEAK CONNTACTOR THAT IS CAUSEING THE PROBLEM
Posted on Aug 10, 2009
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