Comfortmaker Problem

Problems related to residential installations.

Comfortmaker Problem

Postby t6788j1 » Sun Oct 02, 2011 9:27 pm

Tried to start the furnace earlier today, and got the blinking led flashiing 4 times, indicating the highlimit is stuck open. Checked higlimit with an ohm meter and switch is closed. Checked for 24VAC on the input of the switch and output, power is there. The controller is a 50a50-131 General 90. Not sure what to think other than the controller is bad?

Help
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- Comfortmaker Problem

Postby heatseeker » Mon Oct 03, 2011 10:16 am

might be a lose wire on safety swiches
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- Comfortmaker Problem

Postby t6788j1 » Mon Oct 03, 2011 4:54 pm

Followed power to through the high limit back to the controller connector which lands on the CPU. Also followed teh PS and seen it switch from open to closed with the induction motor.
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- Comfortmaker Problem

Postby surenuff » Sat Oct 08, 2011 12:11 am

have you tried killing power and turning back on to reset board?
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