Problem with A/C - http://www.hvacmechanic.com/ Forums
Original message
| mikebobo
 |  "Problem with A/C"
, posted Wed 11 Jun 09:23  
Had problem when the thermostat called for cool, the compressor kicked on but the blower fan would not start or would shut off. I disconnected the Y wire at control board as you had requested. There are two wires on the Y, one blue to the thermostat, and one white to the compressor. This time when it called for cooling, the blower fan did kick on, but the A/C compressor did not. Are you thinking control board?
Mike
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Replies:
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| theduke03
| "Re(1):Problem with A/C" , posted Wed 11 Jun 20:23
Hey Mike. What I meant was to disconnect Y from circuitboard but leave the 2 wires connected together (so outdoor unit will run). If blower stays on then it is definately the board.
"My dad was the most feared furnace fighter in Northern Indiana."
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| | mikebobo
| "Re(2):Problem with A/C" , posted Fri 20 Jun 09:00
With the wires connected both the compressor and the blower fan worked! I ordered a new board. Thanks for all your help! theduke03 is the best!
About your dad being a furnace fighter, what did he do? Was he furnace repairman? Being a fireman I'm interested.
Mike
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| | theduke03
| "Re(3):Problem with A/C" , posted Fri 20 Jun 19:42
Well I do agree that myself and a few other fellas here are the best. However my dad is not a furnacefighter. I stole that line from "A Christmas Story".
"My dad was the most feared furnace fighter in Northern Indiana."
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| new tech
| "Re(1):Problem with A/C" , posted Wed 11 Jun 13:48
The wire you disconnected should have nothing to do with the blower not running. They lead to the contactor which acts as a switch for the outdoor unit. Intermitten problem. Does the board have a self diagnosis test terminal. Jump it out and run the test to see if all is well
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| | theduke03
| "Re(2):Problem with A/C" , posted Wed 11 Jun 20:30
quote:
The wire you disconnected should have nothing to do with the blower not running.
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Actually new tech; Trane and Am. Standard furnaces will run fan on heat speed (med. or whatever) when G is energized. Then when Y is energized it will switch to high speed. If the blower shuts off with Y connected, but stays running with Y disconnected then that means that the board is unable to energize the high speed(cool) terminal.
"My dad was the most feared furnace fighter in Northern Indiana."
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