No heat from heat pump

by Rick Morrison
(Hedgesville, WV)

Fan on/auto switch does work.

No fan or outside unit running on either AC or Heat setting.

Fan does come on if switched to Aux Heat but I don't get any heat.

it is -3 outside.


Help!

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Jan 25, 2014
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SOLVED -- Thermostat
by: Anonymous

Got it working after 2 new thermostats, guess the first one was bad.

Jan 22, 2014
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fan off outside
by: Anonymous

fan off outside but the heating is working

Jan 08, 2014
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Sounds what happned to me...
by: Anonymous

Sounds like your a transformer in your air handler.That stages the E.M. heat in your unit.
When there is a problem with these it will not let the unit come on at all.My Heat-pump a Trane XL 20 split 5 ton fried ours two nights ago.The E.M.
heat can be 5000-15,000 Watt units and if the system senses anything out of the ordinary it will shut everything down.They have to have a TON of air blowing through when they are on because they glow red hot and will start a fire otherwise.My Heat-pump uses a small 2.5Ton compressor then will shift to the 5ton compressor which is rare but, even that has not been enough with this cold.So it will bring on one 5000 watt heater and keep going till it can maintain the temp with in reason.My unit is a very complicated and was put in in 2011.I do know that all Heat pumps have a safety when it comes to E.M. heat.If the air handler does not shut it off it has fuses that will break on them.Even if yours is a older model.

Jan 07, 2014
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Check thermostat
by: Anonymous

The most immediate thing to do is to check your thermostat to determine if the heat pump is getting the signals that you are sending in auto/on or cooling and heating.

In cold weather also wire terminals can sometimes become loose due to metal contracting.

If the thermostat is good then......there is a lot more to troubleshoot.

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