Can anyone help me with the proper way to seal this exhaust duct piece to the draft fan on my furnace? The piece of ducting has a crack along the back of it and is leaking water into my furnace. It looks like I can buy the new horizontal piece a new vertical piece for it, but the current piece looks like it's sealed into the fan with some sort of caulk or something. I want to make sure i seal it correctly if I replace it myself. I'm also not sure how to seal the horizontal piece to the vertical piece. The vertical piece I'm talking about is just outside of this frame on the top side, but it's of the same material as this pipe and extends outside of the furnace. Once outside of the furnace it just transitions to typical PVC and is all glued together. The two pieces (horizontal and vertical) are not locked together tightly, meaning there is some slip and I can move them relative to each other.
I pulled the hose off and made sure it was clear. The trap could be plugged I suppose, but I couldn't take that off without replacing it as its all glued in place to the outside drain pipe.
I have a coleman gas furnace model number 7670c856...I recently got a woodstove and I want to be able to switch the fan only switch on my thermostat on so just my blower runs on the furnace to help push the air thru my vents...I only have a white and red wire going to thermostat...is there a way to do this still...Any help is greatly appreciated
My 15 yr old Lennox fires up when plugged in but doesn't blow heat (and I pull the plug to prevent overheating).
It's a G60UHV(x) series.
I've had "Tecs" loook at it and said I needed a new control board but they were cosly so I went out on Ebay
and bought one (100870-01) and hooked it up last winter but when I wanted heat I'd have to plug it in- the Thermostat seemed to be ignored but did say Wait and Heat On but the furnace would try to start even when the thermo was set to off.
When going back to the original control board that worked for the air conditioning but not heating this spring the AC didn'r work - so I suffered when Sacramento was 116 degrees on Sept 6 2022 .
This winter (now with original CB) the heat would come on for 2 seconds and then shut off - and repeat every 5 minutes.
It pays to take notes when analyzing what the furnace is doing since being 87 tomorrow - I may forget something helpfiul ;-)
I had a controll board that I bought for $25 that I installed today and got past the 2 secaond firing and seemed to be ready to start but heard Expansion noises indicated to me the main blower wasn't working and the heat exchanger was probably taking a beating. so I unplugged.
Think I'm being too comservative - the last "Tec" quoted a prce of $1000 for a control board.
Lennox being proprietary sucks..
12-02-22, 04:17 PM
