Where will i get a Heater Solenoid valve for my 1988 944 ?

[delboy1974del]

Got the usual roasting problem in the 944 i just bought.
had an auto spark look at it and he says i need a heater solenoid valve.

He says itll be blocked up with sludge but i cant find a part number anywhere for one

Its part no 3 in the picture

Does this sound right ?

 

[pauljmcnulty]

See the suppliers faq for suppliers. []

Is it that you only get fully hot air all the time (obviously when the car's warmed up)? It's usually just a plastic clip and metal circlip that holds a rod controlling the flap, about a £ from Porsche and easy to change. Mine is gaffer-taped up, it's flexible enough but not a long term solution.

Remove fuse for glovebox light, remove glovebox and it's very easy to see the rod flopping about as you turn the control from hot to cold and back. Worth checking first.

Clip, and metal fastener: Has someone got the part nos I can add to this pic?

Gaffer tape bodge:

 

[Elliot]

i have about twelve heater units that i will shortly be dismantling so will have some valves available as well as servos etc

cheers

 

[delboy1974del]

the rods are on ok
i just pushed on the diaphram in the engine bay and it blows cold when i push it

i took out the vacuum line to it and sucked on it and it closed giving me cold air

i then took out the top vacuum hose on the heater solenoid inside the car (no3 on that diagram) and blew down it that in turn closed the diaphram and gave me cold air

i,m therefor thinking the solenoid for the heater control valve must be knackered.

Now on inspection the solenoid valve is easy enough to get off the side of the heater box but it has two electical wires that do not unplug so i,m not sure how to get the complete solenoid off.

Does anyone have any experience of this ?

And just to add insult to injury my blowers have just stopped working on positions 1, 2, and 3 now and only blow Roasting hot air on position hurricane 4 !!!

 

[geoffbateman]

I know this might sound odd, but does your car have the windscreen fast defrost option. It is a pushbutton on the dash, similar to the rear screen heater button. If pressed in it automatically sets the heater to maximum hot, maximum blower and directs the air to the screen. It totally overides all the other heater controls when pressed. I know this beacause after I had the car serviced a couple of years ago when i went to pick it up they reported that there was a heater fault and they couldn't get it to blow cold. I thought it was odd as it had been all right on the way there. I drove it back and it was roasting, windows open etc. Next day I thought I'd have a look, check fuses etc, and when in the car in a bit of a gloomy place with the ignition on I could see the faint glow of the tell tale on the switch. Turned it off (latching pushbutton) and problem solved. The mechanic had wiped over the dash after the service and must have caught the pushbutton. I rang them up and let them know what had happenned and they were genuinely surprised as they'd not come across this before. Apparently not fitted on all cars?

 

[simdel1]

ORIGINAL: delboy1974del

And just to add insult to injury my blowers have just stopped working on positions 1, 2, and 3 now and only blow Roasting hot air on position hurricane 4 !!!

I'm not sure how much help this will be, but my fiesta had exactly the same problem a few years back and is a common problem with Fiestas and Kas of that period.

The fan speed control on the Fords is regulated by a big fat resistor that sits in the pasenger footwell and pokes into the intake air-flow for the blower. The idea being that it is cooled by the volume of air that it's blowing. All too frequently the resistor would get too hot and burn out resulting in only positions 0 and 4 being available.

I have no idea where a 'fan speed resistor' might be on a 944, but it might be worth checking.

 

[robwright]

It will be the blower resistor located in the scuttle by the blower under the bonnet.

 

[pauljmcnulty]

And just to add insult to injury my blowers have just stopped working on positions 1, 2, and 3 now and only blow Roasting hot air on position hurricane 4 !!!

Search is your friend! []

It's this little devil, under the plastic shroud over the blower mechanism under the bonnet. You will probably only need to, carefully, spray some contact cleaner on it. They often come back to life on their own after a period of the car being unused. Cheap as chips from a breaker anyway.

 

[delboy1974del]

i do have that option on the dash but thats not the problem as you can tell quite clearly when that wind blower is pushed !!!

 

[delboy1974del]

Whilst driving along the road today the fan started working again on all settings so for now thats sorted.

Need to sort the heat on problem.

I ordered a heater control valve from euro car parts for 23 quid it arrived today but its just the through pipe part they do and the diaphragm is seperate

Sadly they dont sell that []

 

[delboy1974del]

got the glove box out this morning and the clip is indeed broken however the mechanism it attaches to doesnt move when i turn the heater dial.

i can move the rod by hand and i get cold air so something else is broken somewhere.

Does anyone else know what would be stopping the mechanism from moving ? its totally solid

 

[robwright]

I had the same my servo motor wa seized. Or it couldd be the temp knob. Does the servo motor feel hot to touch? If so it is likely to be seized. I am sure alasdair or elliot could supply you with another. You can test them with a 12V battery. Indeed if you fit a new one you will have to set it up as per the directions in the manual, which involves winding the motor all the way then manually opening the flap all the way before reattaching to the clip. Easy stuf just very confined!!!