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Maizenbluman · Jan 25, 2010, 10:34 AM

I have a evcon/colman furnace model 7995-656/D need to locate the electrical schematics for this unit. The one on furnace is not readable, there has been some wire alterations and I would like to be able to track my problem down. Current problem is furnace will run and cycle properly with fan on manual mode(blower fan runs constant). But when I put in auto mode the blower fan does not start and furnace shuts down after the burner lights and builds up heat.

hvac1000 · Jan 25, 2010, 03:14 PM

Is this in a mobile home/manufactured home?

Maizenbluman · Jan 30, 2010, 10:44 AM

Yes this is in a double wide, there is a central air conditioning unit tied into thermstat wiring also. It appears that the blower motor has been changed at some point. Original wiring had a five lead plug to blower motor and currently there is a four lead.

hvac1000 · Jan 30, 2010, 12:23 PM

The fan control is not working properly. On these units it is usually a disc type control for the automatic heat setting. I am going to send you over to a mobile home board. Sign in and post your question under Coleman. These are good guys and they will probably confirm what I just told you. They also have parts at a reasonable price since mobile home furnace parts can be hard to find for a home owner..

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Maizenbluman · Feb 1, 2010, 07:15 AM

Thanks I will check that board out and see if we can get farther.

hvac1000 · Feb 1, 2010, 07:44 AM

No problem. They are good guys over at that site and they have more info on mobile homes than I do.

Maizenbluman · Feb 1, 2010, 11:29 AM

I posted a description of my problem on the site you recommended had not got a response back yet. Do you know how I can acquire a electrical print for this unit?

hvac1000 · Feb 1, 2010, 12:01 PM

No I do not. I have the newer one but that unit is a bit older since I already looked. They have the drawings of the electric for the older ones.

Here is where you can buy one for 15.00. I hate it when they charge for a manual.

Coleman Presidential III 7900 series Details

Here is one for a older Coleman units. It might help you with the wiring but check over all the different model wiring diagrams.

http://www.managemyhome.com/mmh/lis_...L/L0611386.pdf

skunkskull · Nov 4, 2010, 06:59 PM

I have a model eb12b evon heat furnace thermostat is not cutting off when it gets tempature in trailer so my breaker in box will cut off cause it gets to hot?