A/C only blows while driving

b_r_o · May 25, 2018

edm3rd said: ↑

I disagree. On Recirc the cabin air is recirculated - no outside air coming into the HVAC system. When Recirc is off, and at highway speed, fresh outside air under pressure at the windshield base is flowing higher pressure air into the cabin. I have much higher air flow out all vents with Recirc off as no high pressure air flows in from the windshield base.
It may not be as cold, but it is a higher volume of air flow, which is what the OP stated was the difference between at highway speed versus stopped at idle or slow in heavy traffic.
Click to expand...

I think he's talking about the flow of refrigerant through the system

JimIowa · May 25, 2018

I had the same problem with a Maxima, but heat not a/c. Hot heat only at high revs. Cold air at stop lights. Had a plugged or restricted coolant line or heater core. Disregard if my comment here doesn't move with your a/c problem.

SeafireXV · May 25, 2018

Its your cabin air filter. Pull your glovebox and change your filter. I know it sounds simple, but I’ve been there and done that.

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A/C only blows while driving

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A/C only blows while driving

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