What to do to get a heater to vent properly
(Kankakee, IL USA)
Purchased a Reliance 30gal gas hot water 6/29/11. It would not vent properly and would overheat when burner turns on. We were told the chimney was blocked so we proceeded to have a new seamless stainless steel liner installed at a cost of $440. This did not solve the problem.
The only way we can get the heater to vent properly is to open a basement window which causes severe condensation problems in the basement due to the air conditioning pipes.
We do have an exhaust fan in the attic which we've had for 20+ years. If we disconnect the attic fan and shut the window the heater works as it should. We have not made any changes to the house or attic and we are at a loss to know what to do to remedy this problem. We were told to block any openings in the attic which would cause the attic fan to draw air from the basement which we did. Reliance gave us the number to call for a factory trained water heater specialist. He was here on Friday and he did not have a clue what to do.
We are at our wits end with this. We have considered purchasing a ventless water heater and starting over but due to the cost of installing the chimney liner it is financially impossible to do so at this time. PLEASE CAN YOU HELP US?