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How can I tell if it is an imperial?

Okay,
After a cold night of sleeping I woke up this morning and examined the furnace some more. The furnace goes through 5 cycles of lighting then shutting down completely (I realized that late...

I recognize that I am not the most keen person around but I cannot find the flame señor. I found the ignitor but not the señor. But I did jump the R & W terminals and the furnace came on. The furnace...

I will do it right now. I will get back to you in a few. I feel like I am in the middle of an inside joke with the flame sensor picture (mentioned by KC13) and $$$$$.

Thanks for your help.

No worries I completely understand. I really to appreciate your help. Here is the info you requested.

Brand of furnace- Ruud Deluxe 90 Plus
Exact model number of furnace- UGED-06EMAES

I have search the internet for pictures of where the flame señor might be on the furnace but I have not had any luck. I also looked at my furnace with no luck. I tried to upload a picture of my...

Okay I changed the theromstat to an electronic one and checked the contections twice. But unfortunately the same problem exists. The furnace will come on then shut off before the desired tempurature...

I am not 100% sure it is mercury but it sure looks like it. Can you give me an indication of where the selector switch is located?

Thanks again for your help.

Thanks for the reply. I checked and do not believe the unit has a diagnostic LED. The unit is older maybe 10-15 years if that helps. You should also know that the thermostat is a non-electronic...

Sorry it has taken me a while to respond. The reason for this is because right after I posted the question the problem stopped. But the problem has started up again. Here are the answers to you...

Sometimes when I have the furnace set on automatic it will not turn on when the temperature goes below the set point. All I have to do in order for it to work again is turn the furnace off then back...