How hot should the heater blow?

[Sven]

1988 1.9 DG. I know its been cold this week so the heater has had to do a bit of work but seems to be struggling to get the temperature in the van up.
This is when the van is at operating temp. Maybe i should insulate the hot water to the matrix pipe..as i,m sure it looses quite a bit of heat on iys way to the cab... I know its a fair few cubic meters of air to warm up and all that glass doesnt help.
No 1 on the fan the heat seems to feel reasonable but on no 2 is pretty feeble.
What do you think dudes???
Sven

[stuckin88]

The heater works ok in the coldest of weather---where does your temp gauge read--should be just to the right of warning light--if its low-replace thermostat--otherwise your heater could be airlocked--

[TD]

heater should burn your feet on full!
Anything else=problem.
Blocked heater matrix?, or airlock, the latter is easier to fix.
Or has some bod taken the stat out?

[Hacksawbob]

or airlock, the latter is easier to fix

can you get an airlock in the heater matrix? how would you go about fixing that then?

[T'Onion]

could be that the valve isnt opening fully, drop the spare wheel and have a look, also have a look at the cableing behind the switching cover

if it have been bled with the blower swicted to cold then there could be air in the heater

[Sven]

Good question Bob...how do you get rid of an airlock in the matrix...maybe revving its a*** off when bleeding maybe?????????
With the matrix being the highest point doesnt it mean a lot of the air will end up here?????
Sven

[T'Onion]

you have to rev it to about 2000.. 2500 to bled it