Question about Heating & Cooling
Posted by Anonymous on
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Posted on Jan 02, 2017
Hi!!! Does your ac unit work fine?If not check your low voltage problem..You have a low voltage problem check the wire going out to your condensor make sure that they are not touching..Good luck..Check low voltage wires..short in progress..
Posted on Jan 04, 2009
I would suspect you have a problem in the defrost circuit of your heat pump. there are a couple of things you can try. first just run the system on emergency heat and see what happens. you could have a defrost board that is shorting when it kicks into defrost. it sends a signal back to the furnace so it will come on during defrost. if you do not blow a fuse as long as you are running in emergency heat, i would suspect the defrost control board. also you could have a dead short in the wire that runs from the "w" terminal on furnace control board, out to the heat pump. keep in mind that any of the wires could be the cause and i am just tying to give you the most common things. your furnace will still run if you unhook all the low voltage wiring out at the heat pump. if you do this and stop blowing fuses. you know it is something on that wiring. goodl luck.
Posted on Jan 27, 2009
SOURCE: furnace blowing 5 amp fuses
This is caused by a low voltage short. Most often it's the T-stat wires going to the condenser unit outside. Check to see if the insulation on the wires have degraded and replace them if necessary. Also, if the wire has been spliced before redue the joint and weather seal it so that it won't happen again. This is what I do for a living so if you have any more questions, please feel free to ask more questions.
Posted on Mar 21, 2009
You probably have a shorted wire between the heater and the a/c. There are two wires that conncet the control power to the outdoor a/c from the heater they should be on terminal c & y in the heater. disconect those two wires and try it again if the fuse doesnt blow you have a short in the wire between the a/c & heater
Posted on Jun 03, 2009
Look at the contactor on the condensing unit, remove the low voltage wires to the contactor and turn on the system. If the low voltage fuse doesn't blow, replace the contactor.
Posted on Jul 07, 2009
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