BMW E70 Heater Control Valve Replacement 

Yeah it’s a lot of thieves out here

It’s one unit, left and right.

Autel maxisys mini905. it's a decent tool, a bit expensive, but worth every penny to me. It paid for itself already by me not going to the dealer for this car, and my honda accord. I would not see this code with my regular innova 3160B OBD2 scanner.

Is there one on each side? Pretty sure this is my problem

I was having the same issue. Did you find out what the issue was with yours?

What was the issue with yours?

About a quarter, I clamped all the hoses.

Possibly, you can turn turn your thermostat to 80, and feel the hose going into the fire wall to see if they’re hot. If it’s cold, then you have and issue with the solenoid or power/ground circuit.

About 1 hour.

I'm not sure. Go with the ohms values in the video. You can feel the hose going to the fire wall when the engine is hot, and heat running to see if they get hot. If you have a scanner it will show a code for it.

needy392 i have this same issue did you fix it?

I'm not sure. You can look up parts on realm.com bmw parts catalog

I had no symptom, the code showed up in the scanner. There was very little coolant leak from the valves, ie white coolant stain around the valve/solenoid area.

@@radieseltech6417 Ive pulled mine as well coolant leaking around the heater control valve. I've noticed it was leaking when I pop the hood looking because I smelled coolant....

I'm can't say, sounds like it's shorting out, but it would be a good idea to change it, or disconnect it.

Yeah I actually did change it and it fixed the problem, thank you tho!

I`m glad that I`m not alone...had same issue and it was pretty scary must say.

@@kingdennis3383 hey there bud, I'm experiencing this same problem. Smoke in the cabin. Thought I had it fix by replacing the blower motor and resistor but two months later here I am. I read your comments and if you resolved your problem by replacing the heater control valve, correct? I guess I'm going to buy the part and bleed it as well?

This could be your problem, but get it scanned for codes first.

@@radieseltech6417 I’m pretty sure that’s what it is. The original part is $178 on FCP Euro. How long will you think it would take for Labor? Hour or so?

I had no symptom. I scan the car for fault codes once a month. The code was there, so i tracked it down. This may be your issue, you'll have to get a scanner that can connect all module on the car to check. Did you check your cabin air filter for restriction?

@@drone1028 Cabin air filter is good, it does have good airflow. I replaced blower not long ago due to blower making cricket sound. The air temperature is the main issue. The only way I can get the air to be warm enough is..... set both side to maximum 84 degree. This seems to be started when i replace radiator/coolant flushed, so I thought it may be related to control valve

@@haihonguyen Hi, I have same problem. Did u find what was the problem on your car? Tnx

Autel maxisys 905. The 905 was discontinued, now they have the maxisys 906. I think it's about $1200.

Yes, drain the coolant, or block the hoses.

I didn't block the hoses and lost about 1 quart total. It'd be much less if I used the hose clamps.

Brooklyn, NY

Did you ever figure it out? Same thing is happening on my x5.

I had to change my ac compressor now my ac works fine

Did you figure out the problem same problem I have now

@@meritonzebica1541replaced the heater core valve

@@rockshard2425 you replace just heater core valve and after that working fine right?

2013 BMW x5 35i, with straight 6 cylinder n55 engine.

slashrhoads that's possible. You can feel the 2 hose going to the fire in the engine compartment to see if it's hot. It shouldn't be hot. If you have access to a autel scan tool like the one in the video, it will give you soft codes that don't show up on the dash. That's how i knew this was a problem. I didn't have any issue with the heat, but it was winter here in nyc.

R A Diesel Tech have you seen the Bluedriver scan tool? Seems like a detailed scanner enough to provide that info

slashrhoads i have no experience with that brand. I used the autel 905 mini, which has bidirectional. You don't need the scan tool if you have access to the hose. It's 1 line into the solenoid, and 2 out. Just feel the 2 hose going to the fire wall into the car. Also, look for leaks around the solenoid. Mine had a slow leak. Look for the coolant stain streak under the solenoid.

R A Diesel Tech gotcha, I'll give it a try. Thanks

I felt the hose just like you said. going towards the fire wall. measured it with a thermometer and it was over 150 degrees. With the AC on the driver side vent gets 50 degree air towards the middle of the vent and 90 degree on the top of the vent so it seems like that valve is allowing heat to go through even when my AC is on so the cool and hot air are mixing. It seems like the solenoid is partially stuck open. Do you think the valve itself just needs to be replaced or is it possible to clean it or replace the seals?

No. This is the hvac ac/heater system. Unless there is a coolant leak from the valve, which will cause low coolant.