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jyl
Samba Member
Joined: February 13, 2007
Posts: 235
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 Posted: Sat Dec 01, 2018 11:25 am Post subject: HVAC won't blow heated air, only fresh/cold |
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It is time to fix a nagging issue. I don't get heat from the front HVAC system. Fan blows but only fresh (cold) air. Moving the slider from fresh to heat doesn't do anything. This is fine in the summer, bad in the winter. I think the linkage (?) between slider and the flapper or whatever it controls may be wonky? Interestingly, a couple years ago I had the same problem but the HVAC only blew hot air, regardless of slider position. That was bad in the summer, good in the winter. Then one day, fiddling with the slider turned the hot air into fresh air and there it has stayed. I have never delved into the catacombs of the vanagon HVAC system and I'm both clueless and apprehensive. Any thoughts or tips? This isn't going to require pulling apart the whole dash and interior is it?
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1988 Westy, Bostig v2.0 |
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jlrftype7
Samba Member
Joined: July 24, 2018
Posts: 3576
Location: Chicago
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| Posted: Sat Dec 01, 2018 11:44 am Post subject: Re: HVAC won't blow heated air, only fresh/cold |
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Ideally you grab a friend, leave them inside the Van while you head underneath with a flashlight, to watch the Heater valve operate off the cable as your buddy inside moves the Temp Slider slowly back and forth.
No movement of the Heater valve arm or cable ? Maybe it popped off inside the dash or the cable broke.
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'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto |
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jyl
Samba Member
Joined: February 13, 2007
Posts: 235
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| Posted: Sat Dec 01, 2018 12:46 pm Post subject: Re: HVAC won't blow heated air, only fresh/cold |
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I'll get under there with my son today. We are trying to fix another problem, see other thread about ECU box. So it's a day to lay under a van in the rain!
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1988 Westy, Bostig v2.0 |
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dobryan
Samba Member
Joined: March 24, 2006
Posts: 16501
Location: Brookeville, MD
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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32584
Location: Reading Pennsylvania
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VicVan
Samba Member
Joined: July 01, 2015
Posts: 1840
Location: Vancouver Island, BC
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| Posted: Sat Dec 01, 2018 5:06 pm Post subject: Re: HVAC won't blow heated air, only fresh/cold |
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If you find out the valve operates properly, try bleeding air from the cooling system (do a search on the forum on the Libby Bong)
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'90 Little Blue Truck, 2WD auto, FAS GenV 2.0 NA (AVH) |
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jyl
Samba Member
Joined: February 13, 2007
Posts: 235
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| Posted: Sun Dec 02, 2018 1:15 am Post subject: Re: HVAC won't blow heated air, only fresh/cold |
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Oh goody, this sounds like a FUN job!
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1988 Westy, Bostig v2.0 |
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djkeev
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Joined: September 30, 2007
Posts: 32584
Location: Reading Pennsylvania
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