+Most furnaces old enough to use a mechanical fan/limit switch to control the fan have cracked heat exchangers and need to be replaced. Most are 30+ years old.
Assuming your furnace is still safe, if you can't find a cross referenced replacement, should be okay with a newer version provided it is the same length and what you have doesn't have a small heater in it to reduce delay in having the fan turn on.. (length part protruding into the furnace)
Not sure if this part will work. If so how do I hook up the two yellow wires in the middle and do I need to break the middle connector. I tried adjusting the switch but it just doesn't move smooth enough to turn off.
Currently getting quotes to replace the furnace since people say this one is dangerous.
"Not sure if this part will work. If so how do I hook up the two yellow wires in the middle and do I need to break the middle connector."
You have a down flow furnace. The yellow wires energize the timed on feature of your existing fan control. User 10 had provided a warning regarding this. I don't think the new limit control has that feature. Basically, the heat will rise and never turn on the fan so the timed on circuit is needed. Can't really tell from the picture but it looks like the jumper was removed on the original.
Hello
My 92.1% AFUE -76111 Kenmore gas furnace is 12 yrs old and needs the burners clean.
Wondering if there is a way to clean them without removing them or with minimal disassembling.
Thank you
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Looking at new furnaces again and Carrier dealer is recommending Infinity series. So my first question is generally whether these have a good track record. One comment I see online is that there is no combustion chamber cover other than the removable access door. Seems odd and inadequate to me, particularly since my Lennox Pulse has a separate, very heavy metal combustion chamber inside the access area.
My impression is that this is the same design as the Trane, basically, and thus probably the current way they make these things?? Is this just a cheaper and more profitable way the companies have found to manufacture these things, like everything nowadays, that gets them past the industry and govt standards, but is still just tending toward junky and unsafe?
What would be a better quality equivalent in the Trane or other lines? And are there other brands that would be as good or better? If possible to find a totally separate combustion chamber, like the Pulse, I would probably prefer that.
All input greatly appreciated.Read More
09-08-22, 12:09 PM
