heater
- Thread starter Bobpool
- Start date
There is a comprehensive test guide in the workshop manual (available for free download from www.cannell.co.uk/ or promax), but on mine one of the servo motors had seized, it came apart and the motor freed up with a spin on a battery. I guess with an 86 you have the blue red graduated display rather than the temp numbers around the dial. If you have temp numbers around the dial could be the outside air temp sensor. Tony
Bob, Blue/Red display - that'll not be the 'climate control' model. The later cars had a heater which would maintain a set cabin temperature within the range of the outside temperature, so it couldn't go colder than the outside air but would monitor the cabin temperature and keep it constant. This is 'climate control' as it controls the climate, but isn't 'climate control' as is commonly understood (on modern cars 'climate control' implies the presence an air conditioning system.) The 'climate control' 944's had servo motors which controlled the air flaps. If the non-climate-control ones work in the same way then they too will have servo motors. There are some good pictures here: http://www.clarks-garage.com/shop-manual/hvac-01.htm The servo motors do have problems - it's interesting that Tony had a problem with his. Earlier on this week I took the fotowell control servo out of my car as it wasn't working, and discovered that it had got wet at sometime previously and was rusted solid. A bit of TLC, a wire brush and some good lubricant and it came apart and went back together again and now works fine ... Wonders of German engineering, eh? [
] (Shame the servo said "Made in Japan" on the side ... []) Oli.
] (Shame the servo said "Made in Japan" on the side ... []) Oli.Thanks for the replies guy's. [8D] I have no mechanical skill's whatsoever and I unfortunately don't see the servo part's on the link you sent me,sorry[:-] Can you point me in the right direction of which number they are please. As punishment I will read my Haynes manul from cover to cover to get a better understanding and to become a bit less of a ' noob ' []
]Bob, Third photo down, items 2, 3 and 4. "Defrost flap control motor", "Control motor for temperature mix flap and baffle flap" and "Footwell flap control motor" (which is what failed on mine.) The haynes manual is not great, or so it is said (I don't have one.) Try reading the rest of the clarks garage site - it will be much more helpful. Oli. ETA: Working on the servos is easy. They can be removed with only a few screws (although you will be flapping around in the passenger footwell to get to them), and taken off the car. (The footwell flap one is hidden under a plastic cover but that is easy to remove.) Put +12v across terminals 4 and 5 on the connector (use a car battery charger) and if the little lever on the side moves, the servo is OK. Connect the voltage the other way 'round to make the level move the other way ...
Diver944
Active member
Tony and Oli are pointing you in the right direction with Clarks Guide so I'll not add anything useful, but as for the Haynes.......... Just burn it, at least you'll have heat for a short while
It is written for the early square dash cars and most of the info is totally wrong for a later oval dash car like yours.
Yes, download the workshop manuals! The servo motors operate the rods that operate the flaps to blend hot/cold air and direct it in various directions, they are present on the red/blue graduated cars. They actually come apart quite easily but you need to identify which one if that is the problem! They have tracks inside which provide feedback for other functions so they can creat strange effects when not working, Tony PS they are mostly hidden by the glovebox liner, this comes out quite easily but remove the fuse for the light first
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