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 AC working but not cold and Heat not hot

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garykohl2



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Join date : 2016-09-06

PostSubject: AC working but not cold and Heat not hot   Sun Oct 02, 2016 5:09 pm

Hey guys,. Just looking for a little help. I have a 96 Roadmaster wagon in excellent shape. AC has been working fine then today I started having an issue. I turned the temp up from 60 to 70 this morning because it was a little chilly at 4 am. Later I put the AC back down to 60 and its cool but not cold. Then I tried turning the heat all the way up and it gets "warm" but not hot. The AC system is working though because the compressor is coming on and the "aluminum canister" is ice cold and has condensation. Any suggestions?
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silverfox103
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PostSubject: Re: AC working but not cold and Heat not hot   Sun Oct 02, 2016 5:23 pm

Hi Gary

You may have two problems, neither one of them real bad.  Your heater core may need to be flushed, flush it one way then the other.  Your AC just may need a charge.  I think that would take care of the problems.

Tom
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garykohl2



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PostSubject: Re: AC working but not cold and Heat not hot   Sun Oct 02, 2016 7:13 pm

Ok I will look into that. It was just weird to me that it was fine then when I turned the heat on now its not. Its like the temperature setting is stuck warm. Like something isn't opening or closing all the way if that makes sense
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Rev Bob



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Join date : 2016-05-24

PostSubject: Re: AC working but not cold and Heat not hot   Mon Oct 03, 2016 7:13 am

Sounds like a possible mix door problem. You can dump the AC control parameters to check for commanded and actual mix door position. If they don't match, the system has no control over the delivered temperature from the ducts. Sometimes it just needs a calibration, but more often is an actuator or link problem. Do you have an FSM?
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phantom 309

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PostSubject: Re: AC working but not cold and Heat not hot   Mon Oct 03, 2016 12:13 pm

pull the battery cable ,. after a minute or so, hook it up, turn key on no start, wait for hvac to do a recalibrate,. this often works,.
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brokecello
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PostSubject: Re: AC working but not cold and Heat not hot   Mon Oct 03, 2016 3:36 pm

phantom 309 wrote:
pull the battery cable ,. after a minute or so, hook it up, turn key on no start, wait for hvac to do a recalibrate,.  this often works,.

Yes, that has worked for me before too....back in the day I kept thinking it was a clogged heater core. But it was not.
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garykohl2



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Join date : 2016-09-06

PostSubject: Re: AC working but not cold and Heat not hot   Mon Oct 03, 2016 4:50 pm

Thanks guys. I did do the reset and it is switching between heat and AC like it should. The heat is super hot so it turns out I just wasn't giving it time to heat up...lol Sorry
However the AC is still a problem. when I 1st turn it on it feels like its working but just not as cold as it should be. As soon as I start to drive though it isn't cool anymore at all and its like I just have the vent on. So I think it probably just needs a recharge.
Have any of you used the recharge kits you can buy at the auto parts store before? Seems like it should be pretty easy to do.
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phantom 309

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PostSubject: Re: AC working but not cold and Heat not hot   Mon Oct 03, 2016 11:23 pm

garykohl2 wrote:
Hey guys,. Just looking for a little help. I have a 96 Roadmaster wagon in excellent shape. AC has been working fine then today I started having an issue.

so in just one day it went from fine to not working?

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garykohl2



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Join date : 2016-09-06

PostSubject: Re: AC working but not cold and Heat not hot   Tue Oct 04, 2016 5:29 pm

phantom 309 wrote:
garykohl2 wrote:
Hey guys,. Just looking for a little help. I have a 96 Roadmaster wagon in excellent shape. AC has been working fine then today I started having an issue.

so in just one day it went from fine to not working?


Yes. I bought a kit today to recharge it myself and on the gauges it read it should have been fine. Im giving up and taking it to a shop on Friday.
It is definitely working and cooler than just having the vent on but isn't getting cold enough at all. Everything appears to be working so I'm just confused on what the problem could be
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Rev Bob



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PostSubject: Re: AC working but not cold and Heat not hot   Wed Oct 05, 2016 7:21 am

""I'm just confused on what the problem could be""

Did you check the mix door operation?
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garykohl2



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Join date : 2016-09-06

PostSubject: Re: AC working but not cold and Heat not hot   Wed Oct 05, 2016 7:06 pm

Rev Bob wrote:


Did you check the mix door operation?

I did and it seems to be working.
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