Menu toggle

Hot!Heater problem in 993 Turbo

PCGB Member
  • Total Posts : 10
  • Joined: 2010/08/04 22:14:33
  • Status: offline
glennsamuels993 PCGB Member
2019/11/04 18:05:05 (permalink)

Heater problem in 993 Turbo

There is no cooling control on my 993 turbo and consequently hot air is continually being blown into the car. The front air mixer servos (2 off) are working. I have also had the air conditioning recharged. Can anyone shed any light as to where to look for possible causes.

4 Replies Related Threads

    PCGB Member
    • Total Posts : 9204
    • Joined: 2008/02/07 10:19:03
    • Status: online
    tscaptain PCGB Member
    Re: Heater problem in 993 Turbo 2019/11/04 18:06:41 (permalink)
    Moved to 993 forum

    I'm speeding because I have to get there before I forget where I'm going.
    R15 Joint RO
    Gen 2 997 turbo Guards Red/black PDK
    928 S4 Silver
    SWMBO 997 GTS Platinum silver
    Following: @PCGB_997

    PCGB Member
    • Total Posts : 4069
    • Joined: 2003/02/18 17:19:33
    • Status: offline
    MoC2S PCGB Member
    Re: Heater problem in 993 Turbo 2019/11/04 18:12:32 (permalink)
    Hi Glen .. It could be several things, but here's one fairly common fault .. on the front of the CCU there is a small circular vent. There is a fan attached to the CCU which pulls air in that vent to the cabin temperature sensor. If the fan dies or the sensor gets excessively choked with dust, the system goes awry.
    You should be able to hear the fan with ignition on, or for some time after switching the engine off.
    HTH, cheers, Maurice

    Maurice Piper
    993 Register Secretary
    Helpful Info in FAQs & Tech Articles, Suppliers & 993 For Sale !
    ' Wild things are always faster'
    from ' Two Dogs' by Philip Hodgins
    Guest of the Club
    • Total Posts : 1033
    • Joined: 2010/07/21 15:41:02
    • Status: online
    T911UK Guest of the Club
    Re: Heater problem in 993 Turbo 2019/11/05 08:06:49 (permalink)
    More likely to be the servos, if the CCU fan clogs it thinks its hot and cooling will be on all the time, all you ever need to know about the HVAC on a 993;

    993 Turbo
    911 SC Targa - Backdate to 1971
    911 SC Targa - Minted
    Cayenne Turbo S
    Boxster 987 2.7
    PCGB Member
    • Total Posts : 10
    • Joined: 2010/08/04 22:14:33
    • Status: offline
    glennsamuels993 PCGB Member
    Re: Heater problem in 993 Turbo 2019/11/05 19:35:59 (permalink)
    Thanks for the advice. I will check these out
    Jump to:

    Posts made and opinions expressed are those of the individual forum members

    Use of the Forum is subject to the Terms and Conditions


    The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

    Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

    When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

    Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

    Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

    © 2019 APG vNext Commercial Version 4.6