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Diagnostic Code: Primary Limit Circuit Open

7K views 2 replies 2 participants last post by  arete01 
#1 ·
I have a Meridian gas furnace and the blower is running constantly. The heat is working. The diagnostic code is blinking twice and says "Primary Limit Circuit Open".

How can I fix it? Thanks for the help.
 
#3 ·
Blower running constantly. Burner limit open - not primary limit

I checked the filter and all the vents and then shut it off and restarted. Same thing.

I may have read the improper diagnostic code.... i think it's actually the burner limit - not the primary limit.
 
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