2001 986 Heater

[MondialNeil]

Hi Guys

I have taken the heater core out and there is no foam anywhere in the box, the foam on the flap is all intact and in very good condition, no signs of breaking down.

The question I have now is about the flap.

When the heater is put on high the flap completely opens.

As soon as you set the temp to just below high the flap completely shuts, so at 29.5 c I get cold air.

Should the flap close in a graduated fashion when you go down in the temp settings, if it should then this is my problem as the door just completely shuts when not on the high setting.

[MondialNeil]

Hi Guys

This is the cause of my problem, info from Ahsai on Renntech:-


mondialneil, on 04 Jun 2014 - 7:20 PM, said:
Hi Ahsai

I will check the servo.

So the servo should move the flap bit by bit when you change the temperature setting ?

Cheers




Neil.
Exactly. The servo should move the flap proportional to the temp setting. It should be able to stay partially open so it can modulate the air temp by mixing the right amount of hot air with cold to get the exact temp setting you chose.

In other words, as you change the temp setting gradually, the flap should move bit by bit. That's why there's a potentiometer inside the servo that provides a varying output depending on the degree of opening of the flap. I hope that makes sense.