8 replies to this topic

[Captain Accident]

I’m currently replacing all the crusty rubber pipes with some lovely silicone ones and thought since I’ve got everything drained I might as well take the heater matrix out and give it a look over / refurb.

Does anyone have any advice on things I might miss or the process in general ?

[cal844]

Fit a replacement matrix, test the fan on both speeds(where fitted) then you'll also want to fit new foam in the necessary areas.

[Maccmike8]

They come apart easy enough. I cleaned mine out until it ran clear water. It wont be as efficient as a new one but so long as water can get past Im quite happy for now.

[SolarB]

If I remember correctly there are two different length screws. Put them back in the wrong place and the flap no longer moves.

[Tornado99]

Any tips on how to cure buzzing from the heater box?

[SolarB]

The buzzing in my heater was caused by the flap actuation mechanism on the back of the flap. It's a long time ago now, but I seem to recall that playing with this and eliminating any free play in the links stopped the noise.

[johnR]

If I remember rightly the flap hinges are little metal rods sitting in holes in the casings. Next time I take my heater out I've been thinking I'll use rubber grommets or nylon tophat liners to eliminate rattling here.

[Chris1275gt]

I put small diameter heat shrink on mine.

[MiNiKiN]

• You could de-scale the matrix with some citric-acid (coffee machine de-scaler).
• Ensure you replace the foam strips on the flaps  (if later - i.e. post Mk2 - heaters had them I don't know).
• Lubricate the motor bearings with some sewing machine oil or similar.