I have a coleman evcon furnace model number DGU08012UB. The indicator light is flashing 3 times indicating that the pressure switch is stuck open. Would anyone know where I may locate the service manual for this model. I believe this unit is approximately 12 years old and we have just replaced the blower. Thanks,

Parts manual

http://www.hamiltonhomeproducts.com/...-A&B-Parts.pdf

Replacement switch seems expensive but?

2 Wire 1 Hose New OEM Factory Direct Upgraded Replacement Pressure Switch (York): Best Buy Heating and Air Conditioning


Sorry no luck service manual.