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No warm air, and loosing coolant

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New User

Dec 6, 2016, 11:17 AM

Post #1 of 3 (451 views)
No warm air, and loosing coolant Sign In

I have an Passat 3b5, 2000 mod. The climatronic is only blowing cold air. I have bleeded the system, and flushed the heater. The water going in is warm, and the water that comes out is cold. I have ran a self diagnosis test on the climatronic, and it comes out with nothing.

Im also loosing coolant. Its no moist in the exhaust, and no leak in the coolantsystem.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Dec 6, 2016, 1:09 PM

Post #2 of 3 (434 views)
Re: No warm air, and loosing coolant Sign In

You know you are losing coolant so first step is find out where to. If thinking only head gasket and might be it doesn't always just go out exhaust. Do a pressure check and see if it hold.

Warm hose to core in and stone cold out it's probably air bubbles still inside system or not filled properly. Remember, gaskets (head) can add vapors into coolant and first noticed if early is no heat or really poor and erratic heat,


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Dec 6, 2016, 2:36 PM

Post #3 of 3 (425 views)
Re: No warm air, and loosing coolant Sign In

I'd try back flushing that heater core with a garden hose


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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