Looking for a down loadable manual for a Coleman Home Furnace Model: M2RL-060A-16BN Serial# M2A010607683 Kicks in from thermostat, but no heat, no sound of burning - I'm no mechanic but something's wrong. I took off the upper panel and see a red LED lit - NOT flashing. I'm sure the manual would have some sort of LED diagnosis. Thought I'd try looking at a manual first before calling in a technician.