have a code 33. Any ideas?
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On mine it says "limit switch is / has opened".. Basically what has happened is the furnace has gotten too hot and the high limit switch has opened up, could be because of plugged filters or whatever. If it REMAINS OPEN for more than 3 minutes the code will change to a "13" and the heat will lock itself out for 3-hours. Hope this helps!quote:Originally posted by pbush
have a code 33. Any ideas?
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Do what it says to do on the fault code chart, so if that doesn't fix it, it may be the cirucit board is crazy and needs replacement.quote:Originally posted by pbush
have a code 33. Any ideas?Comment
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Has anyone had an occurrence of a Laser 730 or 731 over firing?
The top of the heat chamber and the heat exchanger glow red on high when this occurs....
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