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Old 11-29-2017, 03:43 PM
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Join Date: Nov 2017
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Heater only blowing cold air

84 300 turbo diesel. Ac blows ice cold but heater doesn't blow hot. Checked mono valve and it is good. Any other ideas? Could it be the climate control?
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Old 11-29-2017, 03:49 PM
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Join Date: Sep 2004
Posts: 8,549
Originally Posted by w123Adict View Post
Checked mono valve and it is good.
Could you describe the "check?"

What happens if you disconnect the monovalve harness and drive?
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