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hafe123
Novice
Dec 2, 2011, 5:19 PM
Post #1 of 15
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96 Bonneville SE No Heat
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Hi, I have a 1996 Bonneville SE with no heat. Here is everything that has been tried so far to no avail: New heater core, new thermostat, new water pump, new radiator, system flushed several times, still NO HEAT. Blower works fine. Any other suggestions? Also there is no A/C. Thanks for any help.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 2, 2011, 5:25 PM
Post #2 of 15
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Re: 96 Bonneville SE No Heat
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Heater hoses hot when the engine is warmed up?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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hafe123
Novice
Dec 2, 2011, 5:25 PM
Post #3 of 15
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Re: 96 Bonneville SE No Heat
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Yes hoses get hot
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Hammer Time
Ultimate Carjunky
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Dec 2, 2011, 5:26 PM
Post #4 of 15
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Re: 96 Bonneville SE No Heat
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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 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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hafe123
Novice
Dec 2, 2011, 5:27 PM
Post #5 of 15
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Re: 96 Bonneville SE No Heat
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Does the blend door also affect the A/C?
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Discretesignals
Ultimate Carjunky
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Dec 2, 2011, 5:28 PM
Post #6 of 15
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Re: 96 Bonneville SE No Heat
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Automatic temperature control?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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hafe123
Novice
Dec 2, 2011, 5:29 PM
Post #7 of 15
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Re: 96 Bonneville SE No Heat
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No, its manual
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Hammer Time
Ultimate Carjunky
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Dec 2, 2011, 5:29 PM
Post #8 of 15
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Re: 96 Bonneville SE No Heat
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The blend door effects temperature, regardless of A/C or heat request.
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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.
(This post was edited by Hammer Time on Dec 2, 2011, 5:30 PM)
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hafe123
Novice
Dec 2, 2011, 5:32 PM
Post #9 of 15
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Re: 96 Bonneville SE No Heat
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Where is the blend door located? Behind the glove box perhaps?
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Hammer Time
Ultimate Carjunky
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Dec 2, 2011, 5:36 PM
Post #10 of 15
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Re: 96 Bonneville SE No Heat
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The door itself is internal to the HVAC housing and not accessible. The actuator motor is mounted on top of the HVAC housing but that not real easy to access either.
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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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hafe123
Novice
Dec 2, 2011, 5:41 PM
Post #11 of 15
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Re: 96 Bonneville SE No Heat
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I really have a feeling that the actuator is my problem. I will look more into this and see how tough of a fix its going to be. Thanks for the help.
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Discretesignals
Ultimate Carjunky
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Dec 2, 2011, 5:53 PM
Post #12 of 15
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Re: 96 Bonneville SE No Heat
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As HT stated there is an actuator mounted to the case. Move the temp knob and see if the actuator is moving.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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hafe123
Novice
Dec 2, 2011, 5:55 PM
Post #13 of 15
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Re: 96 Bonneville SE No Heat
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Yeah that actuator looks like a pain to get to, think it would be easiest to just remove the dash to get to to it, or feel around up in there blind with little room?
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Hammer Time
Ultimate Carjunky
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Dec 2, 2011, 6:08 PM
Post #14 of 15
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Re: 96 Bonneville SE No Heat
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The instructions state that dash removal is required but you may be able to at least see it through the glove box to determine if that is your problem or not.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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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hafe123
Novice
Dec 2, 2011, 6:17 PM
Post #15 of 15
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Re: 96 Bonneville SE No Heat
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I'll give that a try then. Thanks a lot, you guys have been a great help.
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