Question about Heating & Cooling
I'm trying to switch out the switches for a zoneair ptac unit model# sea12k34sta. and the part #53187001 was replaced with part #53188001 and the tech. wire diagram for the old one is diffrent than the new one and I don't know how to hook up the new one to replace the old one
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Posted on Jan 02, 2017
SOURCE: Air Conditioner malfunction
Hi, Sounds like you have a short in the control circuit to me. Turn off all power going to the unit. Write down or otherwise mark the wires leaving the control board going to the thermostat. Remove them from the control board. Replace the fuse. Turn power back on and see if the fan still runs. If it does, check and or replace the heat limit switch that brings the fan on during the heat cycle. It may just need adjusted. If the fuse blows, I would think that the control board is probably bad. If it doesn't blow, Remove the thermostat. Leaving all thermostat wires open check them with an Ohm meter. There should be no continuity between them. Twist all the wires together at one end and ohm them again at the other end. You should have complete continuity on all wires. If the wiring checks out, down power the unit. Double check your wire colors and rewire the control board. With all wires open at the thermostat, turn the power back on. Touch the RED wire to the YELLOW wire. The Condensing unit should come on. Touch the RED wire to the GREEN wire. The fan should come on. Touch the RED wire to the WHITE wire. The heat should come on. Down power the unit. Replace the thermostat. Test unit. If the fuse has lasted ok but blows now it is either wired wrong at the Thermostat or the thermostat is bad. I hope I have helped. NOTE: If you can not understand these instructions. Call a licensed Heating / Air conditioning company. kstfas
Posted on Sep 23, 2007
Did you plug upper unit (on roof) into lower control unit (inside). Not to insult you, because i've done it myself, in a rush situation. Breaker on? Sure you didn't mix up any wiring?
Posted on Aug 16, 2008
First, have you removed the wires from the old switch?
If not, then look on the switch, old or new, and see if there are numbers on the terminals. If so, just move the wires one at a time, terminal number to terminal number.
If you have removed the wires, then you will need to find the wiring diagram, which is most likely found somewhere inside the unit or on the back panel. You should be able to identify the correct wire connection from the wiring diagram.
If you can reply the full model number, I might can find a wiring diagram for it and give you more direction.
Posted on Jan 22, 2009
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