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Member Since 07 Jun 2011
Offline Last Active May 18 2015 07:06 AM

#272990 Carrier WeatherMaker with Code 31

Posted by dgp on 03 November 2013 - 11:32 AM

My Carrier WeatherMaker 9200 stopped heating with a code 31.  From reading the forum and manuals it looks like it could be one of several things.


  • Blocked drainage
  • Blocked air duct
  • Pressure Switch Failure
  • Inducer Motor

The motor spins when the system attempts to fire up.  I never see a glow in the burner view port.  I have been unable to locate the inlet from the manual which shows where to pour antifreeze went winterizing.  I read that you could pour water through to see if the drain is clogged.


When this first happened, it was off for a day, then came back on by itself.  For that reason, I was led to believe it was the drainage.  Perhaps the Pressure Switch is getting flaky.  Is there a way to test the switch?  Or should I simply replace it and work from there?



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