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"code 33" - "LIMIT OR FLAME ROLLOUT SWITCH IS OPEN
If limit switch is open longer than 3 minutes code changes to code NO. 13
Check for:
a)Blower motor failure- Blower works
b)motor start capacitor ????
c)open flame rollout switch Tested 24.85 Volts
d)inadequate combustion air supply (flame rollout switch only)
e)dirty air filter Replaced
f)defective limit switch or connections Tested 24.60
g)loose blower wheel" Not
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