how do i repair opentemp limit circuit ?

Old 01-05-20, 12:00 PM
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how do i repair opentemp limit circuit ?

american standard freedom 80
Old 01-05-20, 12:12 PM
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Welcome to the forums.

If it's a basic high limit fault..... it will clear by allowing the furnace to cool, turn power off and then back on.

If the fault is still there it my be a flame rollout switch mounted directly above the burner. The rollout switches will have a little red reset button on them. If that's the problem the furnace needs to be professionally serviced as that is a major problem.

If you look thru the blower door sight glass you should be able to determine which actual fault you are getting.

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