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I have have a YORK central air/ heat unit that is

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.

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  • Heating & Co... Master
  • 34,711 Answers

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

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diths_kri
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SOURCE: central heating HVAC blows cold air -

stat or low battery in tstat

Posted on Jan 07, 2009

meBNme
  • 334 Answers

SOURCE: arcoair central heat /air conditioning unit

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

  • 37 Answers

SOURCE: york central ac keeps blowing 3amp fuse on the

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

james3751
  • 614 Answers

SOURCE: central air unit only blows warm air , when set on cold

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

  • 582 Answers

SOURCE: CENTRAL AIR UNIT IS TRIPPING BREAKER

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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How a Central Air Conditioning System Works
amn_howac.jpg


Facts:
  • The typical central air conditioning system is a split system, with an outdoor air conditioning, or "compressor bearing unit" and an indoor coil, which is usually installed on top of the furnace in the home.
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  • The heat that has transferred to the coil is then "pumped" to the exterior of the home, while the cooled air is pumped back inside, helping to maintain a comfortable indoor temperature.
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  • Cleaner air - As your central air conditioning system draws air out of various rooms in the house through return air ducts, the air is pulled through an air filter, which removes airborne particles such as dust and lint. Sophisticated filters may remove microscopic pollutants, as well. The filtered air is then routed to air supply ductwork that carries it back to rooms.
  • Quieter operation - Because the compressor bearing unit is located outside the home, the indoor noise level from its operation is much lower than that of a free-standing air conditioning unit.





















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