Question about Goodman CLQ36AR49 Air Conditioner

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Two and a half ton Goodman Package Unit

The unit is running the combustion fan motor and the circulating fan constantly. Although the book says it is the high limit switch. All of the limit switches in the unit checks out. The unit will start up, run a burner run, it shuts off and the combustion fan and circulating fan still continue to run. Two new boards has been put in it with the situation remaining the same. Anyone have any idea of what to do or replace since all other parts check out fine.

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  • local24801 Jan 29, 2009

    The unit has been totally taken apart looking and chasing wires and the loop is fine on the limits. But it still wants to run continuously.

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Goodman boards really have to have a very good ground. make sure the ground wire is securely attached. also even though you say the limits are all good, you need to check the wiring that goes from one limit to the next. they should make a loop that goes from the plug at the control board to each limit and then back to the plug. take the plug loose and locate these 2 wires. ohm them out. if it is open, your problem is somewhere in the loop. the fact that the blower is running all the time tells me the board is not getting the signal it is looking for from the limits. I have seen some goodmans that have a rollout problem at the burner box and it melted the wiring to the limits on top of the box.it is hard to see so you have to look closely. also if this is the case, you need to have someone check the heat exchanger for a crack. the rollout usually does not happen till the fan starts blowing while the burners are on. if this is the case, you do not want to run the furnace for any reason as this is a carbon monoxide risk.

Posted on Jan 27, 2009

  • brian baldwin Jan 29, 2009

    have you cleaned the flame sensor by chance??

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