Bitten off more than I can chew

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Originally Posted by mike 90 RR

Clean the switches of the fan speed with circuit board cleaner




Fans not turning / sound jambed?? .... Either a stick is stuck in there / frozen bushes ... or the fans are just CUPUT ..... By secondhand from another D1 wreck


There are 2 sets of fans
1 set for the heater
1 set for the A/C ... (look under the passenger footwell)



Mike

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Thanks Mike,

this makes sense and seems consistent with my problems. Will check out and report back.

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Originally Posted by Disco Brian

Thanks Mike,

this makes sense and seems consistent with my problems. Will check out and report back.

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Your A/C & heater appears to be the same as the RRC 90 to 93 version

The fan speeds (on the RRC) are regulated via a "resistor wire windings" ... Looks like a "old fashioned" white rod with winding of wire around it ... In the RRC it is located inside the "external vent inlet" (above the bonnet) .... on the passenger side

I would suggest that yours has the same resistor fan speed method ..... you can tell when they totally fail, cause all you get is MAX fan speed only

Good luck if it's shot, cause their hard to get new / only found them in the USA .... and it's on "back order" from my Local LR supplier :( (yep, I need 2 of them .... :mad:)

Mike
;)

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Originally Posted by Disco Brian

When the air conditioner is on the fan will work on some speeds but not all. This varies and requires a bit of jiggling of the control lever to get it going sometimes. Once it is going it keeps going.

When on the heater mode the fan doesn't work at all on any speed and it just makes a loud noise.

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The switch sounds like its loose inside,I fixed one on a 92 RR recently. The tin tags holding the switch together need tightening up. You could open it up and check/clean inside it as well.

I replaced the resistor too so I know how hard that is to get at! Got a second hand one from TRS and crimp joined the harness.

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Originally Posted by bee utey

I replaced the resistor too so I know how hard that is to get at!

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Little off shoot here .... on the USA site on how to "remove / replace the resistor pack" ..
They say (working outside at the passenger external vent) undo the rivets / screws ... grab it and pull the harness through the front (external) air vent and the joining connection plug pulls through ... Is this how you have done it???

or did you go the "remove heater" method ....

Mike
:(

I now have heater out. This thing takes up half the car. Now to pull him apart.

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Originally Posted by mike 90 RR

Little off shoot here .... on the USA site on how to "remove / replace the resistor pack" ..
They say (working outside at the passenger external vent) undo the rivets / screws ... grab it and pull the harness through the front (external) air vent and the joining connection plug pulls through ... Is this how you have done it???

or did you go the "remove heater" method ....

Mike
:(

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We had half the dash out, had a look, pulled the resistor and grommet out the front as far as it would go, cut the wires, joined the replacement on with extra wire length, pushed the wires, joiners and "new" grommet back in to seal the hole. Can't remember if we had to tidy wires inside, I think we just shoved it in and it hasn't given any trouble. This was about November last year.

Ok, heater is out and pulled apart. I think the motor needs some attention, there weren't any sticks or leaves jamming up the works.

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Originally Posted by Disco Brian

Ok, heater is out and pulled apart. I think the motor needs some attention, there weren't any sticks or leaves jamming up the works.

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is the green thing the speed resistor?

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Originally Posted by clean32

is the green thing the speed resistor?

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I'd say so. The manual calls it the resistance unit.

The heater motor has been kicking around for a couple of weeks so yesterday I put her in a vice and wired her up to see what would happen. As I expcected it made the horrible noise but it did spin the fan. Grabbed the compressor and gave her a good blast to clean out all the bulldust. A lot quieter. Another blast and a bit of WD40 and its running very well, only a slight groan for a second or two when I start it up.

Very happy, should get out of this one cheaply. Still need to put it back in and look at the switch speeds but I figure I'm on a roll.