We modular home in 2008 with a coleman furance model number DGAA090BDTB we have had nothing but trouble with the furance, the latest thing we found out the heat exchanger was cracking. We have had nothing but trouble with this piece of ****.I will never own anything else with the coleman name on it.

The blinking light on your Coleman Mobile Modular Home Electric Furnace can indicate a variety of issues, and it's important to identify the specific pattern of blinking to determine the cause of the problem. In general, a four-blink pattern can indicate that the furnace has detected a malfunction in the limit switch circuit. The limit switch is a safety device that is designed to shut off the furnace if the temperature inside the furnace becomes too high. If the limit switch is not functioning properly, it can cause the furnace to shut off unexpectedly and display the four-blink error code. To troubleshoot this issue, you will need to check the limit switch and any associated wiring for damage or loose connections. You may also want to check the furnace filter and make sure it is clean, as a dirty filter can cause the furnace to overheat and trigger the limit switch. If you are unable to find your model number online, you may be able to find it on the furnace itself, or you may need to consult the owner's manual for more information. It's important to follow the manufacturer's instructions when performing any repairs to your furnace, as improper repairs can potentially cause further damage or create safety hazards. If you are unsure how to troubleshoot the issue or are uncomfortable working with electrical components, it is recommended that you contact a qualified HVAC technician for assistance.

This could be a number of different things. you may just need a simple service call or something major could be happening. I would call a trained professional on oil furnaces, if you do not know how to properly trouble shoot it.

have to match horsepower,rpm,voltage, fan speed, rotation direction, and shaft size.

Google coleman model/ ignitor order and replace.

need make and model numbers on both units.

Check the air filter and clean. If you can, raise the blower speed up to the next speed. Make sure all of the supply and return grills are open. Is the ductwork connected under the home and well insulated? Does the furnace ever stop or keep on running? If it does stop, you may have a bad thermostat.

almost all thermocouples are universal just need to know the length, ie. 18" , 20", 24" etc...

a short between the red and green wires.red 24v green fan