Search: Posts Made By: Hongtao
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11-22-15, 07:22 PM
Replies: 10
Views: 2,730
Posted By Hongtao

Please allow me ask a stupid question. Limit...

Please allow me ask a stupid question. Limit switch is just a kind of switch which is closed in normal situation. If I use a wire by pass the switch, the whole thing should work as normal (at...
11-22-15, 10:01 AM
Replies: 10
Views: 2,730
Posted By Hongtao

G40UH-36A-070-02. The gas burning canít turn on

Hi, friends,
I still in the same trouble as before. The weather was warm and I am very busy recently. And, I have upstairs heater still function. So, I just put this thing aside for almost two...
11-13-15, 06:42 AM
Replies: 10
Views: 2,730
Posted By Hongtao

Update for my status. It is about LENNOX model...

Update for my status. It is about LENNOX model G40UH-36A-070-02.
The error code is: Primary/secondary Limit switch open.
Both Rollout switches works fine.
Measured the primary limit switch, it is...
11-11-15, 08:29 PM
Replies: 10
Views: 2,730
Posted By Hongtao

Sorry. I checked the manual. Looks my problem...

Sorry. I checked the manual. Looks my problem is still the Primary/secondary Limit switch open issue. I measured the primary limit switch and looks it is ok. But, it is very difficult to reach...
11-11-15, 09:15 AM
Replies: 10
Views: 2,730
Posted By Hongtao

LENNOX model G40UH won't light

This is about furnace of LENNOX model G40UH-36A-070-02. The gas burning canít turn on.

When the power just turn on, the pressure air pump just work for less than 10 seconds and stopped. The main...
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