mfletch69

'99 E55 with 20k miles. I haven'had any issues with the air but it was particularly hot yesterday in my part of Florida...98 degrees.

Anyway, I took the beast out for a 30 miunte drive and started to notice something funny going on with the air.

• Very cold air coming from the passenger side as usual.
• not very cold air coming from the two driver side vents.
• Warm air on my legs

I started playing with the controls figuring an actuator was stuck then I realized that the fan blower was running backward. the more bars - the slower the fan, the less bars the faster.

I get home and turn the car off, pull the key out and the fan keeps running for about 20 seconds ???

Later in the day i went for another 30 mile drive and the fan acted normal but the same air situstion persisted.

Anyone recognize this condition? Any reset tricks? Unplug the battery? Hold the gas pedal to the floor while I press the lighter in?

Thanks in advance

molecule

You might want to try this to see if there are any fault code's ,just did this on mine which had some AC issues didn't get any fault codes but after reset the AC is working fine again ???

PULLING FAULT CODES

Switch ignition on
Set left AC/heater temperature control to HI
Set right AC/heater temperature to LO
Depress REST and EC switches simultaneously within 20 seconds of turning ignition on
Hold REST and EC switches for more than 5 seconds
Air recirculation lamp flashes
Depress right AUTO switch repeatedly. Note trouble codes
FF is not a code

What the codes mean:
003 B1226 In-car temperature sensor with blower
005 B1228 Heater output temperature sensor
006 B1229 " " "
007 B1230 AC evaporator temperature sensor
008 B1231 Engine coolant temperature (ECT) sensor
009 B1232 AC refrigerant pressure sensor
010 B1233 AC refrigerant temperature sensor
011 B1234 AC sunlight sensor
012 B1235 Heater intake air purity sensor
013 B1241 AC refrig pressure sensor, AC temp pressure sensor refrigerant level
014 B1416 Engine coolant pump motor
019 B1417 Engine coolant heater regulator valve LH
020 B1418 " " RH
021 B1419 AC compressor clutch
022 B1420 Idle speed increase
023 B1421 Engine coolant blower motor control module
024 B1422 Serial interface K1
025 B1423 AC heater valve block
026 B1424 AC heater air intake filter actuator
027 B1425 " "
029 B1429 Serial interface K2


RESETTING FAULT CODES:

In fault code mode press both “AUTO” switches simultaneously for more than 5 seconds (after last trouble code is displayed)
Once codes are cleared you will see display change to "d and FF"
Switch ignition OFF – All Codes are erased

mfletch69

Thanks for the suggestions.

• I did the fault code reset but still am having the same problem.
• This week, I will have the system bled and refilled and clean the duovalve.

I will let you know what ends up happening

mfletch69

btw...turns out it was caused by dirty cabin filters. I did not check them because I replaced them 5k miles ago (?)

jtbeche

This reminded me that I've had the car about a year now and thought I'd go ahead and change the cabin filters as preventative stuff. I checked out autohausaz.....are they really $93 and change for the cabin filters???????? Is there somewhere else that has them cheaper? Just seems odd to me that they're that much.

molecule

only 15.95 here http://www.autopartswarehouse.com/sk...%26+Drivetrain

RAFFIE55

I get alot of stuff from www.importeccatalog.com

pretty good prices!!

jtbeche

I guess I should have clarified. The charcoal activated ones were really expensive while the standard ones are obviously cheap. So the question is, do they really make that big of a difference or should I just throw the el cheapo ones in? It's not like I'm in a really dusty dirty environment or have allergies or anything that would require cleaner filtered air.

jtbeche

I ended up changing my cabin filters yesterday. They were definitely dirty but I've seen worse from other people posting pics. Wow what a difference! Before the air blew decent but now it's almost too much. Amazing what a difference a little filter makes.