Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

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Series 100 model no. 58ssb095bc carrier gas fired surnace

The existing inducer fan is making some loud sounds when comming on. The existing heating system is locking out. When testing and jumpering out the blocked vent switch the system comes on. The existing flue serving the existing heating system is open. The system will fire normally for serveral days and lock out again. Are the blocked vent switches only good for sensing only one flue gas failure or should it be replaced. Also could the existing fan induced motor be defective and is not removing all the flue gases causing the blocked vent switch sensor to open and lock down the heating system. I thank you in advance for your attention to this matter.

Bill

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If it is making noise, the motor may be ready to give out. The pressure switch could be faulty, but it sounds as if you need to replace the vent motor if you can find a replacement. Otherwise you've got to replace the entire vent.

Posted on Feb 01, 2009

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