How to reset furnace limit switch with smart ways
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Look at each arm to identify the settings. Set the markers to the appropriate settings for your furnace. If the plenum gets too hot, the limit switch shuts off the burner.
Limit switch codes if the furnace failure code indicates an “open limit” or “open high temperature switch” or “open rollout switch”, it is probable that the furnace has overheated.
The high limit is supposed to reset itself but sometimes they get stuck open. How to set a fan limit control switch open up the access panel on the furnace. Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. York furnacehow to reset limit switch(s) model gy9s/gm9s/gf9s.