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Thread: vents only blowing hot

  1. #1
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    vents only blowing hot

    for some reason my car only blows hot through the vents, I put it on max a/c, heard the compresser kick in but it only blows extremely hot, even on the coldest temp. what could be wrong?

  2. #2
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    ok, I did the self test came out with 025 bled door fail, cleared the codes and it works now, so i'm thinking the actuator is going bad............whose replaced one of there before? lol looks like a fun weekend job.

  3. #3
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    according to inford, the blend door actuator requires the dash to be removed to access.
    Canadian Marauder
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    Addco front and rear sway bars
    lowered with 1 coil cut
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    Ford Racing 4.10's
    Vortech S-trim collecting dust in the closet

  4. #4
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    Quote Originally Posted by want1 View Post
    according to inford, the blend door actuator requires the dash to be removed to access.
    ewwwwww
    2010 fusion se


  5. #5
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    lol I hope not. dont want all the squeeks and rattles afterwards. I checked on CVN and found a thread on how to get at it. the pass airbag has to come out and a vent tube, then you have pretty good access. but you still cant get at one screw very well so the guy from texas just jammed some screws somewhere to hold it in the cold position. god I hope it just keeps working.

  6. #6
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    mine just started acting up as well, I blame it on the lady of the house, she never drives the car, let her take it this morning for a coffee run, comes home say nothing, I get in drive to work, and notice it is high heat at 90 degrees..ugh, so turn it down and still high heat all vents, a/c kicks on but does not cool, so I figure the blend door as well, will attempt to erase codes during lunch today..Hopefully that works! How do I get to the actuator and replace if necessary?
    Vegasloner

  7. #7
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    ok, so I just ran the test on my unit, code 024 comes up which means a blend door short. I was able to manipulate the cold air blowing or hot air depending on how i turned on the unit, problem is now I have a loud ticking sound coming from uner the dash, kida sounds like the actuator is trying to move the blend door, but is stuck. any advise..
    Vegasloner

  8. #8
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    does the situation change if you tell it manualy to do something?

    Quote Originally Posted by vegasloner View Post
    ok, so I just ran the test on my unit, code 024 comes up which means a blend door short. I was able to manipulate the cold air blowing or hot air depending on how i turned on the unit, problem is now I have a loud ticking sound coming from uner the dash, kida sounds like the actuator is trying to move the blend door, but is stuck. any advise..
    Instead of the auto function have you tryed to change the operation manualy to see what it does?

    Never had a problem with mine yet on the Marauder thank god but in my older Grand Marquies when I had it the auto function had some problems at times where as telling it where to blow and manualy adjusting the fan speed it would work just fine.

    Probably barking up the wrong tree here but just trying to see if you have checked out every avenue of the functions to see if one is working and the other isn't or it concerns over all function no matter what.


    Bought Her for my 40th B Day in August of 2004 @ Crest Lincoln Mercury
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    #1183 of a build of 3214
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  9. #9
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    when mine was acting up I just cleared the code by pressing the defrost button when it's displaying the code, havent had a problem since. and ya I looked into it. there is one bolt that is pinned inder some dash parts... the dash needs to be tilted back to get at that actuator.... 8 hour job at the dealer.....

  10. #10
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    Book time 8 hours

    Quote Originally Posted by 4play View Post
    when mine was acting up I just cleared the code by pressing the defrost button when it's displaying the code, havent had a problem since. and ya I looked into it. there is one bolt that is pinned inder some dash parts... the dash needs to be tilted back to get at that actuator.... 8 hour job at the dealer.....
    A tech that has done it before about 4 hours. But the service writer always charges you book time according to general rules seeing the techs are usualy paid by piece work not hourly.


    Bought Her for my 40th B Day in August of 2004 @ Crest Lincoln Mercury
    Assembled 12/17/2003
    #1183 of a build of 3214
    and is #379 of 1237

    Link to Mod's and car:

    http://www.mercurymarauder.net/forum...o=view&id=8832

    Link to Pictures of the Kids/Animals, Cars I have built or a hand in building as well as cars and trucks I have owned.

    http://www.mercurymarauder.net/forum...php?albumid=16

  11. #11
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    UGh..pull the dash, I had an 88 cougar, that the heater core went out in all digital dash and pulled that thing..the noises never stopped afterward..I reset the codes, and it still made the noise. When i operate it manually I can get either cold or hot, automatic I have not tried. I just put a new a/c system in last year, and was hoping I would be good for this vegas summer comming up..not so lucky!
    Vegasloner

  12. #12
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    The trick to stop the sqeeks and noises

    Quote Originally Posted by vegasloner View Post
    UGh..pull the dash, I had an 88 cougar, that the heater core went out in all digital dash and pulled that thing..the noises never stopped afterward..I reset the codes, and it still made the noise. When i operate it manually I can get either cold or hot, automatic I have not tried. I just put a new a/c system in last year, and was hoping I would be good for this vegas summer comming up..not so lucky!
    3m foam backed tape placed against all of the points the dash is bolted up to again. Stops a load of customer complaints after a job is done.

    That is how I solved that problem with the 84 and 85 Ford LTD's that needed heater core's. Remember those mid size 4 door LTD's? A big pain in the ass for heater core's like your Cougar same set up.


    Bought Her for my 40th B Day in August of 2004 @ Crest Lincoln Mercury
    Assembled 12/17/2003
    #1183 of a build of 3214
    and is #379 of 1237

    Link to Mod's and car:

    http://www.mercurymarauder.net/forum...o=view&id=8832

    Link to Pictures of the Kids/Animals, Cars I have built or a hand in building as well as cars and trucks I have owned.

    http://www.mercurymarauder.net/forum...php?albumid=16

  13. #13
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    What I would try first is rebuild the HVAC control module. Just for S&G, since it's easy.
    Thanks to Darrin @ BC Automotive:
    $1800 and it was worse than when he started!

    Brian (FordNut) FPG # 1458 of 7838
    03 MM 300A (Lotsa mods, 130k mi) was 303rwhp/318rwtq N/A
    then 476/410 D1SC ProCharged on stock block
    then 660/555 D1SC PC on 5.3 wet sleeved Teksid alum big bore stroker
    then 365/369 N/A on 5.3 wet sleeved Teksid alum big bore stroker
    Now 751/617 3.4L Whipple on 5.3 Boss5.0 iron big bore stroker

    03 MM 300B Silver (Mostly stock, originally wife's car, 370k mi) FPG # 7053 of 7838 or 49 of 417 SB
    03 MM 300B Silver, Stock, wife's next one, 136k mi FPG # 7134 of 7838 or 89 of 417 SB
    04 MM Silver, Stock, on standby 85k mi, FPG # 1212 of 3214 or 432 of 997 SB
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  14. #14
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    is that The eatc rebuild with the o-rings? i did that about two years ago..I will search for the hvac rebuild
    Vegasloner

  15. #15
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    Sorry, yes it is the EATC rebuild. The HVAC controller is the EATC.
    Thanks to Darrin @ BC Automotive:
    $1800 and it was worse than when he started!

    Brian (FordNut) FPG # 1458 of 7838
    03 MM 300A (Lotsa mods, 130k mi) was 303rwhp/318rwtq N/A
    then 476/410 D1SC ProCharged on stock block
    then 660/555 D1SC PC on 5.3 wet sleeved Teksid alum big bore stroker
    then 365/369 N/A on 5.3 wet sleeved Teksid alum big bore stroker
    Now 751/617 3.4L Whipple on 5.3 Boss5.0 iron big bore stroker

    03 MM 300B Silver (Mostly stock, originally wife's car, 370k mi) FPG # 7053 of 7838 or 49 of 417 SB
    03 MM 300B Silver, Stock, wife's next one, 136k mi FPG # 7134 of 7838 or 89 of 417 SB
    04 MM Silver, Stock, on standby 85k mi, FPG # 1212 of 3214 or 432 of 997 SB
    01 F150 longbed
    01 F150 shortbed
    00 F150 4x4 stepside
    01 F150 4x4 7700
    68 Stang FB (70 351C 4V, 4 wheel discs, project car)

    Mods listed here (some items not current): FordNut's Mods

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