Luck warm heater

Hi all,
I have a 406 2.1td 97. It has a digital AC system but takes quite a while
to warm up let alone get hot! I put it on 30 to get it to warm up but it
takes ages and sometimes doesn't! The AC works fine when set to cold but
the heaters are seriously underpreforming. The fans all work fine.
Does anyone know of this being an issue with these cars and is there a
cheap fix?
Kind regards
Simon

 

This was discussed recently. General consensus is that modern diesel engines
are very efficient at converting fuel to movement. There's not that much
heat left over to feed into the cooling system. My Xantia temp gauge stays
below the middle sector except when towing a caravan in hot summer
temperatures, and even then it only rises just above the centre mark.
Selecting a high heater setting when the engine is cold won't make any
difference to the maximum warmth achievable. That is limited by the
temperature of the coolant around the cylinder head (where it's drawn away
to the heater).
You could try fitting a higher setting thermostat if available,-most open at
about 80C. Ancient remedy you might try is to stick a piece of cardboard or
plastic across the lower half of the radiator. Adjust the size until it
provides what you want without actually setting the fans off or boiling up.
DaveK.

 

energizer wrote in message ...

You may have an airlock in the heater circuit leading to poor circulation.
There should be some bleed screws to let the air out of varous points in the
system ( sorry i don't have a 406 so i don't know where they are located)

Bob

 

check the inlet pipes to the heater
are they hot?
if they are then the flap is incorrectly set by the heater ecu
if they arent hot then could be thermostat or a blockage

 

Thanks all.
I will investigate

Sy