I am having promblems with getting the heat from an older Coleman Direct vent forced air furnace Model #7680a that's installed in a mobile home. The thermostat was replaced The fan comes on. The pilot feed that goes into the side but isn't attached. Do u have any specs on this model?

No but I know a site that specializes in Mobile home furnaces especially Coleman. Go to the link below sign in and post your question under Coleman.

Index page

First reattach the feedline to the pilot light. You need to hold down the control until it lights and continue to hold it for a while to allow the thermocouple to heat up and allow gas to flow. You may need a long wire with a match twisted to the end to light it. They didn't place it in the best location.

Next Check your upper and lower limit switches these are the proper settings:
Upper = 7680-3791= Open @ 140*/Close @ 120*

Lower = 7660-3591 = Open @ 150*/Close @ 130*

Fan- Limit = 7700-3281 = Open @ 120*/Close @ 90*

Next check the burner & automatic relight burner assembly, make sure they are clean and functioning as designed.

If it still does not work feel free to contact me. George