Heater Core Replaced, Now Blows Cold Air
I had a leaking heater core replaced on my 99 Winnebago with a Freightliner XC chassis. No more leaks, but now the dash heater only blows cold air. I suspect my local truck repair guy (who knows hea...
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My Freightliner chassis has yellow shutoff valves for the cab heat water lines back near the engine. You might see if you have those and make sure that they are open.
