Bmw 320ci heaters not working
This is my first post to see if i can get help to fix a problem with my e46.
I have a 2004 320ci coupe and the heaters in the car dont function properly. They blow out cold air once car is started and continue to even though i have it on max... Until the car reaches from what i have gathered over the past week a steady speed over 50 on the motorway. Then the yellow light for the rad water comes on and then the warm air starts to come out. After approx 5 mins the yellow light goes off and the cold air returns. I have checked the water level it had been fine no top up needed no leaks. Any ideas what it could be?
Thanks in advance