I have a three year old Tappan 90% furnace. | |
It wont fire unless I pull the top pressure valve line off. It will run with this line off and plugged. I installed a new one and its still wont run with the line plugged on the nopple. Any suggestions?
Answers:
From: B.T. Lennox Guy
check exhaust and intake pipes for obstruction. check all condensate lines for blockage and proper flow, may even ha ve blockage in secondary heat exchanger. remote chance of a problem with the primary heat exchanger.
remember your issue is with a safety switch which is doing what it is intended to do. shut the furnace down when a problem occurs.
call a qualified contractor.
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