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#1
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No heat 85 300dt.. I searched...where to start
I searched a bit and found some related info.
Posting for a friend with heater woes.... 85 300d turbo and I get no heat ... motor is up to temp and the AC works fine. I am still a little puzzled by the icons on controls on the console but they work.... I am used to the 240 on -off knob. Thermostat seems to be good and it does not over heat. Is the heater electrical contrlled or vacuum or both opinions and links appreciated.. bennett
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81' 240d 4 spd 140k on the clock |
#2
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1. Check the monovalve. It could be stuck closed, or some one wired it to recieve a constant 12 volts. The monovalve is supposed to open, allowing hot water to flow, at 0 volts.
2. Also check to make sure the heater core was not bypassed.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
#3
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Core was not Bypassed... he had heat up until a few weeks ago.
The fan blower works and blows good air.. just no heat fuses are good... did burn one a few weeks ago when the hood pad fell off under the hood and laid on the motor and she got warm but not overheated. Where is the monovalve?
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81' 240d 4 spd 140k on the clock |
#4
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Check to see if the monovalve is getting juice or not. In the heat setting it gets 0 volts, and it's supposed to open. It is mounted on the firewall, passenger side near the valve cover.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
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