806 gone wrong AGAIN!!

[dartmoorcf]

We have two Peugeots... a 405 TD estate which is brilliant and a 806 HDI which is frankly dreadful. So far in the last year, i've spent about £1900 on bills.

The 806 now has another problem. I think it is the PreHeat Unit (1150) as i can just about read Webasto on the label.

When i turn the engine off there is a high pitched squeaking from the unit and a clicking sound when the engine is running.

Any ideas how much one of these will cost and whether it definitely is this unit?

Thanks

[spider]

Not 100% sure on if that is it, not up on the HDi's. The unit is provided to warm the coolant slightly as otherwise they can take an age to provide some heating due to their efficiency.

The clicking may be a relay located in the unit itself. Not sure on the squeal though.