I need furnace help

[DeafBrad]

Hi Everyone,

I live in a mobile home that has a Coleman Evcon electric furnace. I am having trouble with it. The other day it was blowing cold, and the house was cold. The blower was running all the time, non-stop. I decided to take a look at the coils to see if they are burnt out. Nope, the coils were fine.

Then I noticed a part that was popped apart. It is called the sequencer on the electrical diagram. Wires from the internal breaker run to it, and wires run out to the coils, and also to the blower relay.

Inside the sequencer are 2 discs that are concave. The discs can be reassembled a number of different ways. Being put together different ways results in little heat, or a lot, or no blower. I put them in several different ways, and I now have nice, beautiful heat coming out of the registers.

The problem is I have nice, beautiful heat continuously. The furnace never turns off, and it is too warm in here.

Any guys out there who are knowledgeable with furnaces? Any ideas what to look for? This furnace is pretty simple looking, and doesn't have circuit boards or anything in it.

TIA,

Brad

 

[Vern_in_IL]

Bad sequencer replace that. They are not rebuildable. All the sequencer does is a different circuit heats a metal sliver that expands and the higher voltage contacts connect., and when it shuts off, the lower voltage ends, but the contacts remain until the metal cools down and the higher voltage circuit is disconnected.

It's used to kick on the flame before the blower so the plenum can heat up, then it is used to cut the flame, and allow the blower to cool down the plenum to get most of the heat into the house.

if the flame does not go out, then a limit switch will kick in and keep the blower running so you don't warp the plenum.

 

[mk378]

+1 You need a new sequencer. It fell apart that means something broke and it is done. It's not supposed to come apart at all.

 

[DeafBrad]

Thanks for your help. Is it possible I have the discs put together in the wrong sequence? Would a different configuration make it work correctly? The best way I can explain how I put them in is the 2 discs are put together in a way that they are ball shaped... ie ( )

 

[DeafBrad]

Is the sequencer a common part where I can go to the local heating place and they would have one in stock?

 

[Vern_in_IL]

Originally Posted By: DeafBrad
Is the sequencer a common part where I can go to the local heating place and they would have one in stock?


Yeah they are common, just take the old one with you. Depends on the number of connections etc. A good HVAC shop should have a few in stock.

 

[Leo99]

Originally Posted By: DeafBrad
Is the sequencer a common part where I can go to the local heating place and they would have one in stock?


Call them up. Sometimes the local parts places stock parts that are commonly needed for the local homes in the area.

 

[Rick in PA]

For a parts store, you could try Johnstone Supply. I did some work on my heater last year and they have a good selection of HVAC stuff.

 

[SHOZ]

http://www.patriot-supply.com/index.cfm

https://www.comfortgurus.com/

Are two places i use.

 

[DeafBrad]

I have ordered a part and am waiting to get it. In the meantime I plan to run it once in a while to warm up the house. It stays running all the time but I will flip the breaker when it gets too warm in the house.

 

[Leo99]

Get the part yet? Are you deaf? I never noticed your name when I wrote to call up a parts place and ask them. Sorry for any insensitivity on my part.

 

[Youppi]

Quote:
Get the part yet? Are you deaf? I never noticed your name when I wrote to call up a parts place and ask them. Sorry for any insensitivity on my part.


Probably not an issue as most hearing impaired have assistive phones with a text display using a free service for captioning the speech to text on-the-fly between the caller and third party. I had such a phone for a while and it worked OK. In Canada and US, the captioning service is provided for free.

Also there are apps for this kind of service on your smartphone (although not sure if this is free).

 

[DeafBrad]

Originally Posted By: Leo99
Get the part yet? Are you deaf? I never noticed your name when I wrote to call up a parts place and ask them. Sorry for any insensitivity on my part.


Hi Leo,

Yes, I got the part 2 days ago, and installed it. That fixed my problem. And yes, I am deaf/hard of hearing, and no worries, no insensitivity on your part.

As Youppi mentioned, there are video phones that allow deaf people to call on the phone. Plus I have my wife who is hearing. I have her call.

 

[DeafBrad]

Thanks to Leo above asking me if I got the part. That was a good reminder for me to chime in and let people know how things turned out. When I follow discussions in forums I really like to hear what finally happened with whatever was discussed.

I ordered the sequencer online. Locally a store wanted $173 or something like that for the part. I found a comparable part for $29 on ebay. Any guesses which I decided to order from?

It was slightly different that the oem part, but all it took was a little common sense to figure it out. The furnace works good now.

 

[andyd]

Yah, thanks for follow up. I revived my Weber grill with a 6$ part. This will forestall coming home to a brand new one MDW has bought. Webers are good because parts are available