Poor heating system performance!!! All steamed up!!!

diesel-dog · Post by **diesel-dog** » Mon May 21, 2007 6:47 pm

When carrying rained soaked passengers, I have real difficulty on demisting the screen! Full pelt to the screen results in only the lower half clearing! I have noticed that if i move the slider (which is very stiff) over to recirculate air, the blower seems to have moor oomph! but in recirc mode is soon steams up anyway!! Anyone have any ideas? Somedays I wish I had aircon rather than the sunroof!

Incidently its a d8 with all manual controls and no air con/climate control system.

neildavies · Post by **neildavies** » Mon May 21, 2007 8:15 pm

The recirc will be useless for demisting, as your only moving condensation around the car, and not pulling in fresh air. I've never had a 406 without aircon, so can't comment on the performance of the demister. If it is poor and never clears the screen properly, you could have a leaking heater matrix. We had this go on a 306, and on that, it's a dashboard out job.

mjb · Post by **mjb** » Mon May 21, 2007 8:45 pm

It sounds like something's restricting the incoming air. Is the pollen filter clogged, or has crud/leaves fallen down the tube beneath it?

diesel-dog · Post by **diesel-dog** » Mon May 21, 2007 8:48 pm

mjb wrote:It sounds like something's restricting the incoming air. Is the pollen filter clogged, or has crud/leaves fallen down the tube beneath it?

I have checked for crud, leaves etc, but all is clear. Would my model have a polen filter, if so where would I find it?

Thanks

mjb · Post by **mjb** » Mon May 21, 2007 10:43 pm

It's behind the bit of black plastic that sits between the bottom of the windscreen and the bonnet on the passenger side. All the air entering the cabin goes through it. It may be a good idea to shove a vacuum cleaner pipe down the hole under the filter

diesel-dog · Post by **diesel-dog** » Mon May 21, 2007 11:22 pm

mjb wrote:It's behind the bit of black plastic that sits between the bottom of the windscreen and the bonnet on the passenger side. All the air entering the cabin goes through it. It may be a good idea to shove a vacuum cleaner pipe down the hole under the filter

Thanks for the tip, I will give that a go in the morning. It would explain why the blower seems more efficient when on recirc-being that the air is not passing through a possible blockage.

Cheers