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Old 02-07-2010, 12:43 PM   #16
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B.C. as in Canada? You need a 90,000 BTU unit for your house. I can heat 1800-2000 sq.ft in -40C Winnipeg with that unit. WAY oversized for BC. Sorry. May need a new inducer, circuit board etc in the near future. Better to buy the proper sized unit and get it professionally installed. In Canada gas permits/inspections are a necessity or your insurance company will have a BIG problem with you.

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Old 02-07-2010, 12:46 PM   #17
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In Canada gas permits/inspections are a necessity or your insurance company will have a BIG problem with you.
I thought they just canceled the policy. Problem gone.
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Old 02-07-2010, 12:50 PM   #18
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It is a VERY serious situation. We had a garage fire (overheated rechargable battery) in the property I grew up in. Insurance companies will go up your behind with a microscope looking for an excuse to not pay. You can also be liable if the damage spreads to the neighbors.
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Old 02-07-2010, 12:51 PM   #19
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Change the blower speed. Instead of the yellow wire(med/low) going to the heating terminal of the control board make it the brown ( med/high) or black (high). Then check the return air temp and supply air temp with the furnace heating. Temp rise should match the name plate information.
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Old 02-07-2010, 12:57 PM   #20
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thanks again for the replies. Yuri are you saying the overheating will cause the inducer or cicuit board to fail?
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Old 02-07-2010, 01:02 PM   #21
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No. But I have worked on hundreds of them and know what parts go at what age and the history of that unit (I am a Lennox dealer). You will overheat and cause the heat exchanger to fail SOON. I would need to see your ductwork but it sounds way oversized for your house and climate. I would be very concerned about liability etc, the rules are a lot more strict in Canada and there are no DIY furnace sales in big box stores etc up here for a reason. Ignorance of the law is no excuse in court.
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Old 02-07-2010, 01:04 PM   #22
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what can i expect to see happen when the heat exchanger fails
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Old 02-07-2010, 01:08 PM   #23
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You won`t see it. I am trying to keep you safe and won`t go any further if you don`t seem interested in doing it according to the code etc. Reread my post above yours.
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Old 02-07-2010, 01:10 PM   #24
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You won`t see it.
But your relatives could read about your death from it.
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Old 02-07-2010, 01:19 PM   #25
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what can i expect to see happen when the heat exchanger fails
The Carbon MonOxide can escape the vent and exit into the house. CO kills. Early warning signs can include headaches, a feeling of moisture in the house. A final sign is when you or your family die. Your gas supplier or a licensed, professional heating expert will be able to test for CO.

The fix may be a new heat exchanger or new furnace. Ask Yuri the process to hire a competent contractor. He sounds like he knows his stuff.

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