gkeleher Posted January 3, 2010 Report Share Posted January 3, 2010 The blower motor runs on high with car off and no heat once engine warms up. Coolant level is fine. Quote Link to comment Share on other sites More sharing options...
KHE Posted January 3, 2010 Report Share Posted January 3, 2010 (edited) You didn't say what car this was occurring on but from your profile, it states a '93 Sixty Special (Sedan deVille). If that is the car, the blower motor control module is often the culprit. There is a special tee in the heater hose circuit. One leg of the tee has an orifice. If the tee is not installed properly or if it is replaced with a generic tee from a hardware store, no-heat will result. Edited January 3, 2010 by KHE Quote Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
gkeleher Posted January 3, 2010 Author Report Share Posted January 3, 2010 You didn't say what car this was occurring on but from your profile, it states a '93 Sixty Special (Sedan deVille). If that is the car, the blower motor control module is often the culprit. There is a special tee in the heater hose circuit. One leg of the tee has an orifice. If the tee is not installed properly or if it is replaced with a generic tee from a hardware store, no-heat will result. Thanks, the tee is the original and worked before the blower problem. The water is warm to there but seems cooler past it. I just can't imagine both starting at the same time. Being a retired mechanic I suspected the control module so I'll try that first, I just don't work on caddys. Quote Link to comment Share on other sites More sharing options...
Ranger Posted January 4, 2010 Report Share Posted January 4, 2010 You didn't say what car this was occurring on but from your profile, it states a '93 Sixty Special (Sedan deVille). If that is the car, the blower motor control module is often the culprit. There is a special tee in the heater hose circuit. One leg of the tee has an orifice. If the tee is not installed properly or if it is replaced with a generic tee from a hardware store, no-heat will result. Thanks, the tee is the original and worked before the blower problem. The water is warm to there but seems cooler past it. I just can't imagine both starting at the same time. Being a retired mechanic I suspected the control module so I'll try that first, I just don't work on caddys. Maybe the restrictor in the T is plugged. Quote Link to comment Share on other sites More sharing options...
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