Mike Moore Posted December 20, 2005 Share Posted December 20, 2005 85 GL wagen. temp control clable is adjusted right. Heater hose's hot going in and a little cooler coming out. But just a little heat coming out. Fan blowing strong. Is there some way that to much cool air bypassin heater core. it gets cold here and need heat Help Mike PS also flushed out heater core and good flow through it. Got a 190 thermstate in it. Chilten manual not much help. Quote Link to comment Share on other sites More sharing options...
Tsullappliance Posted December 20, 2005 Share Posted December 20, 2005 Is the air flow across the heater core unobstructed and is the blower box sealed tightly? You may be pulling air from in front of the heater instead of through it with either of these problems. also flushed out heater core and good flow through it. Got a 190 thermstate in it. Chilten manual not much help. Quote Link to comment Share on other sites More sharing options...
Mike Moore Posted December 20, 2005 Author Share Posted December 20, 2005 As far as I can tell heater box is sealed tight. Really don't want to have to pull the whole heater out if I can help it. If I turn temp all the way down nothing but cold air. air flow seems to be good. Air is only a little warm with temp control all the way up. Haven't checked all the servos to see if they are working right. They are a little hard to get to. I just need heat out of this thing don't care how. Quote Link to comment Share on other sites More sharing options...
shawnsbrat Posted December 21, 2005 Share Posted December 21, 2005 Possibly a restricted/clogged core.Pull hose and run your garden hose thru it to test flow.If restricted,try some muratic acid from the plumbing store and pump thru. flush real good with fresh water after that. Good luck and let us know the outcome Quote Link to comment Share on other sites More sharing options...
Mark Humble Posted December 21, 2005 Share Posted December 21, 2005 Sounds like its stuck in the vent position. If you can, try to check to see if the servo for that air valve is working or if its even still connected. May also just be a vacuum hose off, even one under the hood. Quote Link to comment Share on other sites More sharing options...
Mike Moore Posted December 21, 2005 Author Share Posted December 21, 2005 like I said I have flushed out the heater core and have good flow through it. The Chilton book I have doesn't tell me what servo does what. The heater hose's are hot. As far as the vac goes everything works there all the buttons work and change to what they are suppose to do. If there is anything I can by pass to get heat I will do that. Just have to have heat when it's down to 14 degrees. IF anybody has a good heater diagram and can email it to me I can use it. Thanks Mike Quote Link to comment Share on other sites More sharing options...
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