Question about Heating & Cooling
Is this an electric furnace using heating strips as the heat source?
Or is it a heat pump system?
Posted on Dec 02, 2014
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Posted on Jan 02, 2017
Are you getting 24 volts at the contactor coil? If not check your control voltage wiring to the unit. If all is good check refrigerant charge, you will need gauges for this, compressor can be held out due to low pressure, also unit can be out by the high pressure safety switch which is normally reset manually.
Posted on Jul 14, 2009
SOURCE: Blown Transformer heat pump
blown transformers are usually from a low voltage short the first thing i would do is wire a automotive or resetable 3amp fuse in line with the transformer so you dont blow transformer after transformer the wire coming off the transformer that say 24v take that wire a couple of inches down and cut it and install the fuse in series there
now you can go through your low voltage wires one by one and test them unhook all the wires to your outdoor condenser at your indoor unit(furnace or airhandler) and try turning it to cool now if you blow the fuse the short is between the tstat and the indoor unit if the fuse is still good leave it on cool and hook up one wire at a time to your outdoor unit starting with R a lot of times your contactor or your defrost board will short out on you also look for pinches in wires wires with cracks in the insulation and wires touching metal this situation can be a real pain sometimes i would recommend calling a hvac company if you start to get stumped
hope this will help you
Posted on Jul 26, 2009
Set the thermostat so that the a/c should be on. Make sure you have 24vac at the contactor. If you don't recheck your wiring. Also you can go to the thermostat and install a jumper between R and Y. The contactor should pull in. If it does, your thermostat may be the problem. Let me know what you find so I can offer more advice.
Posted on Aug 06, 2010
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