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Rangoonboth
New User
Oct 21, 2011, 8:34 PM
Post #1 of 7
(3992 views)
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Lukewarm heat from vents
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I have an 03 chevy venture that is blowing cool heat out of the vents. The heat coming out is warm at best and with a 45° temp outside, the inside of my van will not get comfortably warm. My wife is not happy.
within the last year I have put in a new thermostat, a new radiator and a new front heater core and had the system flushed. I get a lot of air out of the vents it's just not very warm.
Could it be somthing like a temp sensor or the hot/cold selector door is not closing all the way when I put it on the heat setting.
Pleas help.
Thanks, Eric
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 21, 2011, 11:36 PM
Post #2 of 7
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Re: Lukewarm heat from vents
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Hard to see but could be a diverter door/flap not working properly,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 22, 2011, 3:01 AM
Post #3 of 7
(3960 views)
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Re: Lukewarm heat from vents
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With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If not too hot to hold, then you have to look at the actual engine temp and if that is up, if it is, then your looking at a restricted heater core.
If you find that they are both too hot to hold, then the heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
If they are both not too hot to hold on to, then you either have a restricted heater core or the system is not completely full and getting air pockets for some reason.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 22, 2011, 5:47 AM
Post #4 of 7
(3951 views)
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Re: Lukewarm heat from vents
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If this has rear air and heat, is the rear heater putting out hot air?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 22, 2011, 6:09 AM
Post #5 of 7
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Re: Lukewarm heat from vents
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I think if he had heat coming out of the rear he wouldn't have been so concerned about the front. We will find the problem if he follows the instructions.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 22, 2011, 6:16 AM
Post #6 of 7
(3938 views)
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Re: Lukewarm heat from vents
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That's true. Just seeing if he has rear heat because that would tell you if there was a coolant flow problem or possible air pockets. Then you would go after the blend door.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 22, 2011, 7:54 AM
Post #7 of 7
(3932 views)
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Re: Lukewarm heat from vents
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He still wouldn't know if the front core is plugged up or not.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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