just cant figure it out...what the hells wrong

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garrytd4

New Member
Posts
268
Location
Stevenage, Hertfordshire
ok, so ive already posted about this, sorry to create another but i though id start a fresh up to date.

i really need help with this
I still cant get hot air through the vents, coolant has been flushed, bled and refilled, didnt work. all vent cables inside dash checked and tested, didnt work. bled the pipe that goes though firewall, didnt work.

There is one thing i havnt tried and thats this:
Britcar (UK) Ltd > JWL000020 FUEL BURN SENSOR AMBIENT DIS11-F/L (G)
will this help?

If not then i have no idea whats wrong, autumn and winter just round corner need to get the heating working.

Please help
 
silly ? but have you changed the thermostat? is the heater getting remotely worm? might be stuck shut
 
goughy said:
silly ? but have you changed the thermostat? is the heater getting remotely worm? might be stuck shut
Click to expand...

On my last one a 2.0DL the heater didn't warm up for ages - I sold it before fixing it (10 years!!!) but was told thermostats mostly fail in the open position thereby not allowing full temp quickly and so heater being slow to warm.
 
i havnt changed the thermostat, if i go for a long drive and then stay stationary for 5 - 10 mins the heat will build up but then as i drive away cold air is back....its like it takes ages to build up and last for seconds.
I have just in the last half hour removed the top hose going into or more specifically coming out of the heater matrix and turn engine on to see if coolant is flowing, it is coming out of the matrix, but it wasnt gushing out, its that normal?

ive heard replacing thermastat on td4 is big bucks?
 
if you take the thermostat out put it in a pan of water and boil it as the water gets hot the stat should open then cool the water down and it should close, if this dosent happen then the stat is fu**ed hope this helps failing that flush the cooling system the matrix may be blocked or remove pipe that goes into matrix put a hose pipe on matrix and flush it through it should run clear out of the coolant pip;)
 
after much research im beginning to think its the thermostat, although i will fluh the matrix first and see if that does it.

the haynes says you gotta take off alot of thing to change the stat, but ive read guides saying you dont.
 
not sure how to remove it but shouldnt be that hard manuals go around the world to tell u how to do a job lol if im doing anything i find look through the manual then just go for it if you get stuck refer back to the manual;)
 
Well compared to other cars removing the stat on the TD4 is a bit more involved. Never done it myself but looked into it last winter when I thought mine was playing up and its not a small job.
 
Changing the thermostat is a bit of a bugger, water pump has to come out!
Done it a few times now... So have come up with a few possible short cuts if you decide to do it!

Chris.
 
Did it work before? Has someone by passed the heater matrix as it was leaking?
 
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