HVAC Questions? Ask an HVAC Expert for Answers ASAP
Thanks for giving me the opportunity to help! Is this a forced air furnace?
Hi, Tim! Yes, it is
Are you still there?
Yes, I'm here....it is a forced air furnace
Do you have an old mercury type thermostat?
Let me see...
It is an Intertherm....it's got a lever on top
There's a silver coil inside
Is this a mobile home?
I don't see a mercury bulb, but it may be behind the panel
Yes, it's a mobile home
it does look like an old style thermostat....definitely not a "state of the art"
If it's a mercury type stat, these have to be level and have the anticipator set correctly
I checked the Nordyne manual and it said the .4 was normal....that's what I set it for
It had been set all the way to 1.7
Setting it to .4 didn't seem to help at all
The larger the number you set it to, the longer it will run and the less chance of short cycling.
I haven't moved the thermostate at all, but I can check if it's level
Oh, well it was short cycling at 1.7
Now describe what you mean by short cycling...
But you're right, it has gotten worse since I set it to factory spec...that's why I got with you guys
The furnace will kick on and run for a bit...then it shuts off all of a sudden....then it comes back on in less than a minute or so
Then the cycle repeats
It does this early in the morning when the house is cold and you know that the furnace should be running for a while
It really sounds like you need to replace your thermostat
Boy, I would be so happy if that were it
Would you be able to tell me what kind of thermostat would be compatible with the kind of furnace I have?
Mercury stats are quite old. After a while, the mercury becomes contaminated and doesn't work properly.
Well, the house is about 10 years old now
If you could tell me what thermostat I could get that would work that would be great. Also, would I be able to install it myself or would I have to have an HVAC tech do that?
I'd try a new stat first. There could be other issues going on, but you'd need to get more involved with troubleshooting.
I have checked online and read that replacing the thermostat has solved short cycling problems
Are these questions that you can answer?
Here's a good one, relatively cheap....
Easy to install, directions inside...
Oh, super! :)
So, if this doesn't work, what would you suggest next?
Make sure you shut the power to the furnace off first.
I always try to have a backup :)
Oh yeah, I'll shut off the switch at the breaker box
Then we'd need to get into more detailed troubleshooting involving a voltmeter.
OK, that's good to know
If this doesn't work, that is.
I will get this thermo and hope for the best! Thank you so much for your help!
No problem. Let me know how it goes...
I will....if I do need to get back with you again, will I get you or just whoever is there?
You can ask for me. Or many of our techs are highly qualified.
Naw, I'm kind of partial to things I'm familiar with. Besides, I've been having a really rough day and you've made it a little better. :)
Great. I'm glad to hear THAT.
Thanks! So, are we good to go and I can hit the Accept button?
OK. I hope you have a super weekend! Thanks again!