Our Carrier 52CQb315 air conditioner was installed incorrectly so we can only get heat. Per a Carrier Tech, there are only 5 wires run to the wall mount thermostat (the O terminal for the reversing valve is not connected.) They mentioned this could be corrected by correcting the wiring in the main unit and controlling the tempature with a remote control. Can this be done or is there a better solution? If so, where can I find a remote control.
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Is this a heat pump? Look in the thermostat. You should have something like the following.
Red wire to R terminal
Green wire to G terminal
Yellow wire to Y terminal
White wire to W or W1
Blue or Orange wire to the O or B terminal
Brown wire to C terminal.
Let me know what you have in the thermostat. The wire colors are not always the same.
Sounds like they wired it direct to line voltage , it should run through a sequencer or fan relay to cycle on and off , your seq./relay could be stuck closed to but unlikely being it was just repaired , call the service company back before you do anything they are responsible.
you probably purchased a 4 wire thermostat which we call heat/cool you stated you have 6 wires which signifies a heat pump you have to purcahase a heat pump thermostat and then write down the color of the wires to there related spots example...yellowe-y red-r white- w and so forth also before you do this kill the power the voltage typical for residential is only 24v's but if the wires touch you could blow a fuse
the e2 code on a carrier comfort zone thermostat is indicitive of the external safety sensors which are located on your units ductwork in the attic. the e2 code are the hpt/ and lat sensor codes. the hpt is the heat pump temperature sensor and the lat is the leaving air temperature sensor. you can pull off the cover of the panel and behind it will actually give you all the fault codes associated with you carrier tsat.each sensor has a certain ohm rating and if its out of the range it will fail. now as to the reasons for failure, the indoor coil could be dirty, filters dirty, refrigerant charge incorrect.
24VAC Heat/Cool Single-Stage Heat Pump
A common heat pump system has the following wiring & connections:
Call For Auxiliary Heat
Force Fan On
Y or Y1
C/O or O