Engine heater
Anyone else have a problem with the engine heater and the window defroster not working properly. The fan goes on but no heat. We have a 99 Monaco Windsor. If you have had this problem, what did you...
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Check to make sure hot coolant is getting to the heater core. There is an on off flow control valve on most dash heater units. You can tell under the hood. Find the heater hoses and see if both are hot in and out of the HVAC box (do this by touch). If not follow the cool hose back until you find the valve.
