Car starts and runs fine , takes about 10 -15 minutes for heat to start coming through , at first nice and cosy. After about 30 minutes , heat gradually goes and will not come back until engine is stopped and cool , then re started. Stat was changed approx. 1 month ago , no change , bled as much...

My name is Jim and I am on my 3rd disco , 2x Tdi latest one Td5. I have a problem with the heating Car takes about 10-15 minutes for heat to come thru , warms up nicely at first then after about 30 minutes all heat goes , does not come back unless Ilet engine cool down and start again.All air...