Lennox Furnace Heat keeps running - http://www.hvacmechanic.com/ Forums
Original message
| cudamike
 |  "Lennox Furnace Heat keeps running"
, posted Thu 26 Oct 12:58  
Hello,I am working with an older Lennox Electric Furnace model E10Q-751-2P.When the furnace is turned on it starts and will heat the house and never turn off until I turn off the breaker.I replaced the 30 year old factory blower motor over the summer and the A/C functions flawlessly ,runs great ,cools excellent and turns on/off without any issues I believe the thermostat is functioning properly.Does this sound like a limiting switch issue? This unit has four Heat element limiting switches, numbers 1,2,3 look identical and number 4 looks different.I don'tknow if this is the source of the problem but I figure it is a place to start troubleshooting.Question can these limiting switches be adjusted and tested ? If possible I would like to narrow things down before I begin purchasing replacement components. Any help is greatly appreciated .Thanks cudamike in Virginia
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Replies:
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| hvac
| "Re(1):Lennox Furnace Heat keeps running" , posted Thu 26 Oct 14:30
It sounds like the sequencer is stuck closed.
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| | cudamike
| "Re(2):Lennox Furnace Heat keeps running" , posted Thu 26 Oct 16:30
Thank you for your reply regarding my Lennox Electric E10Q3 Furnace. Sequencer, that's the same as a thermo limiting switch right? I found one bad (no continuity) limiter switch the #2 out of 4 switches.I tried to order one locally ,told 2-3 weeks seems like an excessive waiting time guess because I am not one of their big account contractor's.They told me I can'torder a whole kit of 4.Any recommendations for purchasing over the internet.Thanks again Cudamike in Virginia
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