Coleman Evcon Fan motor
Posted: Wed Feb 20, 2008 11:41 am
Coleman Evcon Model DGAT090BDD Nordyne Fan 901998
When it gets cold weather out the fan shuts down for 5 to 10 seconds and kicks back on. After awhile a code comes on (4 flashes) signaling limit cycling. Sometimes it will come out of it and furnace keeps running. Other times the furnace shuts down and I have to switch off rocker switch and turn back on to start furnace back up. Tech said to replace fan motor as it felt hotter than normal. Replaced motor and ran good until cold weather (20 below) came back. Same thing with new motor. Cleaned off air cond evaporator and seems to be enough air coming out. Switched to "on" at the the thermostat instead of "auto" and everything is fine. Only thing is that the motor runs on high all the time. Could it be that I have a voltage problem going to low speed on the fan? Problem with circuit board? Thanks.
When it gets cold weather out the fan shuts down for 5 to 10 seconds and kicks back on. After awhile a code comes on (4 flashes) signaling limit cycling. Sometimes it will come out of it and furnace keeps running. Other times the furnace shuts down and I have to switch off rocker switch and turn back on to start furnace back up. Tech said to replace fan motor as it felt hotter than normal. Replaced motor and ran good until cold weather (20 below) came back. Same thing with new motor. Cleaned off air cond evaporator and seems to be enough air coming out. Switched to "on" at the the thermostat instead of "auto" and everything is fine. Only thing is that the motor runs on high all the time. Could it be that I have a voltage problem going to low speed on the fan? Problem with circuit board? Thanks.