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Old 11-17-2011, 10:42 AM   #1
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york diamond 80 Open High Limit Switch

On start-up I get the one red flashing light that is telling me the system is ok. Then the inducer fan starts-ok, then the blower motor starts and I get the error code 4 flashes that the High Limit Switch is open. No flame, No Heat, just the Inducer fan and Blower motor running with the error code? Any ideas what to look for?

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Old 11-17-2011, 06:08 PM   #2
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york diamond 80 Open High Limit Switch

bad limit switch, sits above the burners and should have a rating like L170 or higher.

"Cut it twice and it is still too short".
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