E46 Air con problem

[Petrus]

Water (Heater) Valve change.

hi guys,

just to share i did a DIY change on the Water (Heater) Valve Recently. there are also lots of this on the net, but thought I'd share my process with you all....

You can do it yourself, but I had one friend assisting just to hold the hoses to make sure not too much coolant escapes the hose. Some of the pics are below.

Please excuse the dusty engine bay. Was travelling along construction place prior to the change.

First, remove the air supply intake. There are three push pins holding it that u can remove with a Flatbed screwdriver.

Next, proceed to to removing the airbox. For this you need to unscrew 2 x 10mm bolt, the MAF cable, and the clamp that is holding the airbox.

Once you remove, the airbox, the Water (Heater) valve is visible. Unplug the cable supply of the Water (Heater) Valve.

Now, proceed to removing the water valve from the socket that is holding it.

There are two hoses connected to the water valve. Unscrew the hoses. This is the part where you need to be careful not to let too much coolant drip out. I had one friend hold one of the hoses while i was unscrewing the other hose. Immediately clamp and screw back the two hoses to the new Water valve

Now process is complete. Just need to put back the water valve to its socket again and install back the air box.

Once all is done, MAKE SURE you top up COOLANT and BLEED YOUR SYSTEM !!! This is due to some of the coolants that dripped and air was introduced into the system when you unscrewed the hose from the initial water valve.

All the best !!!

By the way, if your a/c feel don't feel cold or blowing cold air from one vent and hot air from one vent, try charging the gas first before immediately doing this.

 

[merz_e46]

need help from senior bimmerz

I got problem with my Bimmerz E46 320i A/C..Blower not running..check the fuse,its look like good..control panel also good..

 

[Petrus]

Blower not running at all or intermittently blowing out of control ???? Is your control panel for A/C still running?

 

[merz_e46]

petrus

a/c control panel in good condition..the blower not running at all.that why no cold air came out...pls help me

 

[eediot]

petrus

a/c control panel in good condition..the blower not running at all.that why no cold air came out...pls help me

had some problem few weeks ago. change the aircond compressor and it works fine.

 

[Petrus]

hi merz_e46,

This could be due to some reasons. But I had similar problem before. One morning it was running fine, then after came back from lunch (parked under hot sun), blower didn't turn on at all.

After doing some research, I change the Final Stage Unit (FSU). This FSU seems to be "controlling" the blower fan. If you are handy, you can try changing it yourself. I am sorry coz I didnt take any pics of the DIY replacement for this. It took me nearly one hour to dismantle it coz I had to sit in an upside down position (plus, the access to it was very small place)

But the image below is how the FSU looks like. This my old part taken out.

My ride is 320i E46 2.2 2001 Japan Spec. For my car, this item is located underneath the centre dashboard (near where you rest your left leg).

Perhaps you can try borrowing FSU from other friends that has E46 and try if it is really your FSU giving you problem or not rather than jumping into conclusion that it is something major.

Item no 3 is the FSU

Btw, if you switch on the a/c and you don't here the compressor kicking in with the hissing sound, then it might just be your compressor (or other parts) as bro eediot mentioned ..

 

[merz_e46]

had some problem few weeks ago. change the aircond compressor and it works fine.

Thanks bro..i dont think my comp down because try to increase the blower fan but nothing..

 

[merz_e46]

Hi Petrus

thanks bro..i also think coz by the FSU..the fuse and the comp in good condt.i try to replace that FSU..

 

[tweiboon]

hi guys,

just to share i did a DIY change on the Water (Heater) Valve Recently. there are also lots of this on the net, but thought I'd share my process with you all....

You can do it yourself, but I had one friend assisting just to hold the hoses to make sure not too much coolant escapes the hose. Some of the pics are below.

Please excuse the dusty engine bay. Was travelling along construction place prior to the change.

First, remove the air supply intake. There are three push pins holding it that u can remove with a Flatbed screwdriver.

Next, proceed to to removing the airbox. For this you need to unscrew 2 x 10mm bolt, the MAF cable, and the clamp that is holding the airbox.

Once you remove, the airbox, the Water (Heater) valve is visible. Unplug the cable supply of the Water (Heater) Valve.

Now, proceed to removing the water valve from the socket that is holding it.

There are two hoses connected to the water valve. Unscrew the hoses. This is the part where you need to be careful not to let too much coolant drip out. I had one friend hold one of the hoses while i was unscrewing the other hose. Immediately clamp and screw back the two hoses to the new Water valve

Now process is complete. Just need to put back the water valve to its socket again and install back the air box.

Once all is done, MAKE SURE you top up COOLANT and BLEED YOUR SYSTEM !!! This is due to some of the coolants that dripped and air was introduced into the system when you unscrewed the hose from the initial water valve.

All the best !!!

By the way, if your a/c feel don't feel cold or blowing cold air from one vent and hot air from one vent, try charging the gas first before immediately doing this.

Your car soap in the water when flood ? How come your car very dirty ?

 

[Petrus]

Your car soap in the water when flood ? How come your car very dirty ?

As I mentioned in the 4th line in my post, I was travelling along Construction Site prior to change of the valve.

 

[piea]

hi everyone.my ride e46 318i got aircond problem...the aircond compressor cannot auto cut off.when use the auto mode the air cond center side come out hot air but driver side come out cool air.when drive the car long time.but if press the aircond compressor button can manually cut off the compressor...this problem make me trouble half year aready...aready cheack the gas n change the temperature sensor.the problem also same...

 

[xcrave]

search the forum this had been discussed before...

 

[ezudine]

manage to solve my prob..
- cooling oil
- valve
- another part i forgot..
cost me RM9++

so cheap.. where you done it bro?? please advise