Top Radiator Hose is HARD and HEATER is Blowing Cold Air

[BUELLRIDER]

I dont get it the Heater is Blowing Cold Air when on HOT and on High and I noticed the top Radiator Hose gets Hard when the motor is Hot.

[86_6series]

Make sure your heater valve is working, opening to let hot water into heater core.

#1

https://www.realoem.com/bmw/enUS/showpa ... Id=64_0091

When the engine warms up and the thermostat opens to let hot water to the radiator the hose will feel hard

because it's under presser.

[Pod]

If the valve is working, then you must have a blockage either in the heater matrix or one of the hoses.

[85MSteinway]

I've recently dealt with similar symptoms, mine were intermittent though. Heater valve failed. there is a rebuild for about 15 dollars on one of the parts stores. Pelican maybe? beats the 300 dollars asked for the whole valve. easy rebuild too.

[86_6series]

I've owned my 6 for almost 32 years. I tried repair kits twice with little longevity.
Since I knew I would never sell it, and sometimes I would drive it in the dead of winter,
I went with the OEM part way back when and never looked back.

Just saying that be prepared if the repair kit doesn't last that long.

Bob V

[BUELLRIDER]

Is there a Fuse to it. Maybe I can bypass it.Is there a RELAY to it????