2010 audi heating issue

[madramzi24]

Hey,

Has anyone come across cold air blowing out of the vents when the heat is on high with the engine warm? I've been driving around and sometimes I get hot air but its 50/50 chance either hot or cold air. Just trying to get this issue resolved.

Thanks guys

[BaggedGLI]

Re: 2010 audi heating issue

Could be a mixture flap needing adaptation for not fully opening or closing. B8 S4 are notorious for thermostat issues. I would start with those. If issues persist further diagnosis or a heater core flush, depends how you would want to proceed.

[witchcraftz]

Re: 2010 audi heating issue

I had the air blend door break on my MK4 jetta a few winters ago winter. Not hard but took a bit of time to disassemble the dash to get inside and fix it.

[madramzi24]

Re: 2010 audi heating issue

Could be a mixture flap needing adaptation for not fully opening or closing. B8 S4 are notorious for thermostat issues. I would start with those. If issues persist further diagnosis or a heater core flush, depends how you would want to proceed.

I'm calling around for rates on the thermostat. No way in hell am I doing it haha. WAYYYY too much work.

[madramzi24]

Re: 2010 audi heating issue

little update, I tried doing a heater core flush. No luck. I did some more research and on audizine people said there was a recall back in 2011 on these bad boys. Hopefully that's still a thing.

[Geobmx4life]

Re: 2010 audi heating issue

Here's a link you can use to see if your car has any recalls, just type in the VIN. Keep us posted
http://web.audiusa.com/recall/

[BaggedGLI]

Re: 2010 audi heating issue

little update, I tried doing a heater core flush. No luck. I did some more research and on audizine people said there was a recall back in 2011 on these bad boys. Hopefully that's still a thing.

What did you use to flush? We have a pump we hook up that circulates and heats the flushing solution through the heater core.

[madramzi24]

Re: 2010 audi heating issue

Here's a link you can use to see if your car has any recalls, just type in the VIN. Keep us posted
http://web.audiusa.com/recall/

Hey, I checked that out. Nothing for my vin. Other vin's had recalls on their thermostats haha.

What did you use to flush? We have a pump we hook up that circulates and heats the flushing solution through the heater core.

I just used a hand pump with warm water than a prestone flush and clean bottle. I pumped 8 liters of warm water through than I pumped the flush and clean and topped up with g12.

[BaggedGLI]

Re: 2010 audi heating issue

We typically flush for 8-12 hours.

[witchcraftz]

Re: 2010 audi heating issue

We typically flush for 8-12 hours.

Wow, that is an in depth cleaning there.

[R_Ethug]

Re: 2010 audi heating issue

LOL 8-12!?? I need to flush the all road soon as it barely pumps heat out anymore I was just going to do a few back and forth using Home Depot hoses and my air compressor and maybe some CLR or something