TD5 cold heater

Went out this morning heater was working well then went cold, top hose nice and hot, the small pipe coming off it was quite cold, and so were the heater pipes going into the bulkhead, ive bled the system and all seems ok so im a bit stumped, any ideas chaps ?

might be an air lock though, prepare some coolant in a bottle and drive it about 10 miles on plain ground keeping revs above 2500 with the tank's cap removed then top up coolant if needed and tighten well the cap, this might dislodge the air if there is any

My heater has been behaving somewhat oddly too. I drove it on Friday and the heater worked nicely for the five or six mile I was travelling. On the way home I noticed that it was starting to blow cool air, not exactly cold but cool.
So, I checked the level of the cooling system on Saturday when it was totally cold and everything was as normal, no drop in level nor was there a rise in level.
I put it down to "one of those things" until today. I went down to town and everything was working as normal, heater working nicely, then on the way home it started blowing cool again, so just out of curiosity I turned the temperature setting to 23 degrees and it started blowing hot again.
So from this I surmise that the heater system is working as it should. My Disco has the automatic climate control on it.
This time of year, the outside temperature might be "brass monkeys" but the sun still has enough power to warm the air temperature inside the cabin so that the cleverness of the climate control measures the difference between the measured and set temperatures it decides that as Cole Porter once wrote, it's "too darn hot" and sets about trying to equalise everything by blowing some cool air.

@brian47 Have you tried cleaning the temperature sensor in the cabin?

Cheers

neilly said:

@brian47 Have you tried cleaning the temperature sensor in the cabin?

Cheers

Click to expand...

Nah, never got around to it, given a blow though once or twice with a can of air. As I said it all seems to be working OK ATM.

So if you want to get warm, open the windows

davidsmith1307 said:

So if you want to get warm, open the windows

Click to expand...

Nope, what I am questioning is why have a cabin thermostat and two zone settings with automatic climate control if when the system does come up to the preset temperature you continue to pump hot air into the cabin?
Anyway it was just my two pen'worth thrown into a discussion which might or might not have some bearing on the original question.

No as i dont have cc but thanks lol