Hi there,

I'm at a bit of a loss right now.
My A4 has no heat coming from the vents what so ever, no matter what temperature I set it too.

I've replaced the thermostat, flushed the heater core, and checked the water pump.
The sensors are working fine as the car detects the cabin temperature.
Both hoses going into the heater core are hot and there was minimal debris when I flushed it.

There are no codes coming in from OBD II
Any suggestions for what else it could be? The Winnipeg winters are brutal and fast approaching, I want to fix this sooner than later.

 

Alright, so just an update.
I was able to get the heat working after flushing/back flushing the heater core for the third time. The first time I used an air compressor, the second time just water from a garden hose, and the third time I used CLR and the garden hose. After bleeding the air from the system my heat has been working steady for the last two weeks.