now that it is getting cold, the heater is being used...
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MBWorld Fanatic!
Joined: Nov 2001
Posts: 3,600
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From: Earth
GLB 250 4matic
now that it is getting cold, the heater is being used...
but i notice that it makes a relatively high pitched noise for a while before it settles down. is that normal? maybe i'll record the sound so you can hear it, mbtech?
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Joined: Nov 2001
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ML
No, Not Normal
Sounds like you have 01 or 00 model year. The noise you describe isn't normal since the comporessor isn't running in heat mode. The only other possibility is the fan. Try running the A/C and check if the noise persists. Then run system (A/C and Heat)in both auto and manual mode? Run in both recirc and none recirc mode. If the noise persists, have the system checked - it's probably the fan. If it only happens in one mode, I'll start by making sure that t the vents are not blocked by dry leaves or the like. Hopefully MBTech will give you more info.
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Joined: Nov 2001
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ML
Re: now that it is getting cold, the heater is being used...
Originally posted by young
but i notice that it makes a relatively high pitched noise for a while before it settles down. is that normal? maybe i'll record the sound so you can hear it, mbtech?
but i notice that it makes a relatively high pitched noise for a while before it settles down. is that normal? maybe i'll record the sound so you can hear it, mbtech?
Thread Starter
MBWorld Fanatic!
Joined: Nov 2001
Posts: 3,600
Likes: 1
From: Earth
GLB 250 4matic
i have a 2002 c230k coupe. i'll have to try those tests more, but i'm pretty sure it only happens when its generating heat in the morning and not the AC. i'll check for leaves tomorrow morning - actually, we have a ton of trees here and they've just all fallen.
