300SE Heater not blowing warm after radiator swap

[bob15489]

I've been searching through the forums and have come up pretty empty for my issue. My radiator cracked where the upper hose connects and I swapped it out last week. Ever since then the heater seems to be acting funny. It won't start blowing warm air at all when I start it from cold even after it warms up. The temp gauge shows appropriate temp and it's lukewarm at best. After driving it around and then shutting it off then starting again it blows warm but then starts to cool off. Before the radiator was swapped everything worked great. Has anybody ever heard of an issue like this? Thanks

To remove this ad, register today or login if you already are registered!

[morris374]

yea i had the same problem with my 420 sel i put in a new radiator and my heat stopped working as well... i dont really drive the car in the cold so ive never addressed the problem