'81 300TD Turbo. Changed climate control unit and heat started working. Couple of days later no heat again. I'm hearing a light hissing sound and suspect a leak. Where would be the most likely place to start looking based on the no heat problem and the hissing?
I would check your servo unit... that big blocky thing with heater hoses attached to it... common problem.
Would this be the beast behind the glove box that has the actuator attached to the door on the top and the fan in the bottom?
No... in the hood.
Ahhhhhh Ok, thanks.
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