same issue here

It's a pain in the ass to change out. That's why i suggested trying to flush it first. The 96 blazer i drove back in high school had the original dexcool in it when i got it and no heat. It had clogged the heater core but i was able to blow it out with a hose.

the windows fog up when the a/c isn't running and you're just recirculating stale air/your breath. you need fresh a/c air to de-fog. Unless you meant it FROSTED over, in which case heat is needed to defrost..

tell her to turn the a/c on next time it fogs up, doesn't matter the temperature, and put it to the defrost setting so it's blowing on the windshield. It'll unfog

as for the heat, prolly the heater core or since it's an older vehicle I know the cable that opens the diverter valve can get closed/open, so when you turn the temp from hot/cold, it just stays on cold. happened in my old car, might try checking that.

good lkuck

IIRC girlfriends sister did hers by cutting some of the dash out. Busted one of the vent tubes, other thsn that didn't take them long.

His blend doors should be vacuum operated and easy to tell if they are moving. I could hear mine switch over.

Hahahahahaha!!!

Ah, post accident soft top jeep memories.

This

could be a stuck thermostat too. Good luck!

Power inverter and a space heater.

Tell your gf to dress warmer and keep a handful of paper towels handy to clear the windshield while driving.


Hope this helps.