View single post by hvacdrd
 Posted: Wed Nov 29th, 2006 07:07 pm
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hvacdrd



Joined: Wed Aug 16th, 2006
Location: Michigan USA
Posts: 1186
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 OK, the pressure switch has nothing to do with the blanket over the return air, just a coincidence.

On power up with a call for heat, the exhaust motor should start first.

Check the pressure switch tubing for obstructions

Verify that the condensate lines are clear

Check the exhaust pipe for obstructions

If those check out ok then you will need to test the pressure(negative pressure) at the switch to move further.

If you are not sure what I am talking about let me know and I will try to explain it another way.

 



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