Troubleshooting for a friend, heat and AC

[mr.elmwood]

So she says "How come my vents blow cool air at a stop but when I am moving I get warm air?". This is in Canuckistan, late fall, when, heat is a good thing.

I start running through trouble shooting, and then, she says "This has been happening for a year or so".

07 Impala LTZ 168K kliks, yer 100K 'Merican miles. 

I simply ended the conversation.

[honestdom]

Thats why its Highly Recomended that You should take into the Dealer for its
100,000 mi. Check up
To get all the Old Air out & put the New Air in.

Just my 3.5 cents

[sockmonkeydave]

When I got the Ford exploder, the gal thought she had a cracked block.

But it was a 5 buck water check valve.

Then the thermostat was froze, so there was no heat.

At a stop, your friend would have no heat, but running down the road, she would.

Down here in the states we put a piece of cardboard in front of the radiator.

But I may have that backwards.

[mr.elmwood]

She is a very nice lady. Not real high on responsibility, for anything. "The Boxer" lyrics, slightly altered came to mind:

"I have squandered my existence for a pocketful of mumbles - such are promises:
All lies and jest, still a woman hears what she wants to hear
and disregards the rest"

Such is her existence. To try to get through to her? Far too late.

She has a total disregard for any sort of maintenance.

[ripsmc]

This usually means a vacuum leak somewhere. If the car has a one-way valve it's possible that could have failed.

They're usually located on the firewall and are dirt cheap and easy to buy and replace if needed.

[marinermikes]

Or it could just be low on antifreeze.