Heating problems
Thread Starter
Member
Joined: Feb 2004
Posts: 130
Likes: 0
From: Pennsylvania
2000 S430, 2002 Range Rover HSE 1985 BMW 535 (Sold), 99 BMW 530 (R.I.P), 98 Mazda Millenia (R.I.P)
Heating problems
Hey folks...need some advice here. 2000 S430 - heat works sometimes, and at other times it stops working. I turn the fan up and can hear it blowing, but nothing actually comes out through the vents.
Help needed!
Help needed!
MBWorld Fanatic!
Joined: Dec 2004
Posts: 3,063
Likes: 26
From: Tampa, FL
2005 S500 4-Matic, 1978 450SL
You guys have had a lot of snow in the Northeast. Be sure your A/C intake wells in front of the windshield is not full of water, ice, or snow!!! See https://mbworld.org/forums/s-class-w...ins-clean.html for one of many writeups on this. If this is the problem, get the water out before it causes damage to your SAM units. $$$$$
I would suspect a duovalve problem if the symptom was only loss of heat - but you could also have a problem with the actuators positioning the flaps that direct air around the system. For duovalve, see https://mbworld.org/forums/e-class-w...rol-valve.html.
You can do some troubleshooting using the A/C control readouts - see posts 11 and 13 at https://mbworld.org/forums/s-class-w...-problems.html - you won't need the missing photos. http://www.benzworld.org/forums/w220...control-o.html covers the same topic, but is easier to use.
I don't have any bookmarks for troubleshooting the flap actuators.
I would suspect a duovalve problem if the symptom was only loss of heat - but you could also have a problem with the actuators positioning the flaps that direct air around the system. For duovalve, see https://mbworld.org/forums/e-class-w...rol-valve.html.
You can do some troubleshooting using the A/C control readouts - see posts 11 and 13 at https://mbworld.org/forums/s-class-w...-problems.html - you won't need the missing photos. http://www.benzworld.org/forums/w220...control-o.html covers the same topic, but is easier to use.
I don't have any bookmarks for troubleshooting the flap actuators.
