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I am having problems with my lennox furnace. It had a dirty…

Hi, I am having problems...
Hi, I am having problems with my lennox furnace. It had a dirty filter and now I am getting limit switch on error code. I have tried turning power off and back on but am still getting error
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Answered in 1 hour by:
3/8/2018
Bill
Bill, HVAC Technician
Category: HVAC
Satisfied Customers: 114
Experience: Service Mgr
Verified

Hello,

I am very sorry for the delay. Do you still need assistance?

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Customer reply replied 5 months ago
i will be back home in 20 min. Can i text you then

yes I will be online

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Customer reply replied 5 months ago
I think I was able to reset it. The furnace is now on and seems to be working. Thanks.

Excellent news.

If it drops out again just let me know.

Bill

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Customer reply replied 5 months ago
It actually just turned off again

is the light in bottom blinking a certain pattern? what is model number?

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Customer reply replied 5 months ago
Lenox G60 UHV. Right light steady, left light blinking

start at page 59 HERE

tell me what you diagnostic matches up to

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Customer reply replied 5 months ago
2.1

Has it actually run heat since you replaced filter?

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Customer reply replied 5 months ago
No it hasn't

Ok on the front wall behind the gas valve....mounted flat against the wall is credit card sized flat plate with 2 wires attached, do you see this?

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first turn power switch off.

Then tap that switch plate 3-4 times.

Turn power on...and tell me if same code

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Customer reply replied 5 months ago
It went on. Now simultaneous fast flash
Customer reply replied 5 months ago
Just turned off. Same error code as before
Customer reply replied 5 months ago
You still with me?

yes....now remove those 2 wires and hook the wires directly together...totally bypassing the flat plate...tell me if ction

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Customer reply replied 5 months ago
They are both in a plastic casing. Do I cut them out or how to i remove the wires?

just use a short wire or paperclip shaped in a U and insert the u shaped wire into the wire ends inside the plastic

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Customer reply replied 5 months ago
OK i did that. When I turned it on it stared up again

so with the switch bypassed the furnace runs?

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Customer reply replied 5 months ago
far it is running

Thank you, ***** ***** tripped and is no longer in calibration. Get the numbers from the limit plate and Google the part number. The limits are easy to find, easy to replace, and pretty affordable.

Change that limit plate out and you are back in bussiness.

Please rate service at top of page to close question

Thank you!

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Customer reply replied 5 months ago
Thank you Bill. Is it safe to run the heat with the bypass until i get the new part?
Customer reply replied 5 months ago
Just shut down again. Same error code

I cannot tell you it is .

What I would do is to remove the part, heat with hair dryer on the sensor end ( you see this when you take it out) then put it in the freezer 10 min.

Remove and try it again. Sometimes this coaxes them closed. If that does not work replace it.

But I would keep an eye on it. The worst case = lets say by coincidence the blower motor failed...then furnace would over heat.

Did the jumper move or lose contact that shut down furnace?

Bill
Bill, HVAC Technician
Category: HVAC
Satisfied Customers: 114
Experience: Service Mgr
Verified
Bill and 87 other HVAC Specialists are ready to help you
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Customer reply replied 5 months ago
I put the part in the freezer. I will see if that works. I will order a new part tomorrow.
Thanks
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