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.

Is this in a mobile home/manufactured home?

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.

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..

Index page (http://www.mobilehomerepair.com/phpbb/index.php)

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

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

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?

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 (http://www.hvacmanuals.com/detailed_manual.php?manuals_id=34)


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_pdf/INSTL/L0611386.pdf

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?