pressure gauge on furnace will read zero and every now and then will go to 30. The pressure relief valve will open and release the pressure. Is this an expansion tank issue. this furnace is 50 years old and runs great except for this problem.

Asked by Greg on 11/22/2008 0  Answer

ManualsOnline posted an answer 16 years ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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