Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-02-2011, 02:32 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,872
Normal Heat at the vent temps?

I was just wondering about the heat at the vent temps. On my '82 300D, I put the temp to MAX, fan on auto, with the middle button pressed on the CCU.

That air gets really hot! I used the thermometer that I bought for checking vent temps for the A/C.

With the car at normal operating temp (between 80 and 90C), cruising down the highway, the thermometer stayed at 150F.

In Auto mode and the dial set between 22 and 28C, it will hit the 150F for a while, and when the system reaches it's desired temp in the cabin, it slowly backs of and stays between 100F and 120F.

The Gas furnace at the house runs 120F at the vent.

What numbers do you guys get? When someone said the MB heater is a blast furnace, they were not kidding!
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

03 VW Golf TDI 5 speed 372K Miles

RIP--Lost in fire...82 300D 322K was My Daily Driver-On the search for a w126 now...

90 Dodge D250 5.9 Cummins/5 speed. 350K
Reply With Quote
  #2  
Old 12-03-2011, 07:46 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Since the SD is mixing external air, I don't ever get above 100F.

I have to find that issue..............
Reply With Quote
  #3  
Old 12-03-2011, 08:42 PM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,036
The vent temp will also depend on the blower speed....on low the heat in my SD can get pretty intense on the max setting with the engine at full operating temp. My 420's monovalve is not working well, so it barely accomplishes 90F with the blower on lowest speed, any higher and the air gets very cool right away. Good thing its a summer car. It came from south florida, so I doubt they used the heat much.
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 78k - mine - (OC-80,500)
'17 Metris(VITO!) - 8k - wifes (OC-10k)
'01 E320 Wagon - 159k - mine (OC-160,000)
'89 420SEL 166k - mine (OC-167,000)
'01 E320 - 171k - dad's (OC-171,500)
'07 E350 Wagon - 131k - dad's (OC-132,500)
'01 SL500 - 49k - dad's (OC-52,000)
'09 E350 4matic Sedan - 129k - Brothers (OC-128,000)
Reply With Quote
  #4  
Old 12-07-2011, 12:51 PM
Registered User
 
Join Date: Nov 2010
Location: TX
Posts: 3,579
Is it normal for the blower on auto to run on a lower speed in heating mode when the car is freezing inside? It only gains speed when stopped. it worked perfectly in the summer with A/C - as the fan cycled its speed.

It gets the temperature controlled pretty nicely though.
__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
Reply With Quote
  #5  
Old 12-07-2011, 12:53 PM
Banned
 
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Quote:
Originally Posted by Zulfiqar View Post
Is it normal for the blower on auto to run on a lower speed in heating mode when the car is freezing inside?
Nope.

The blower, once it passes it's thermal cutoff temperature, runs a full speed when the interior is very cold.

Either the CCU is not responding to the interior temperature, or the interior temperature sensor is NG.
Reply With Quote
  #6  
Old 12-07-2011, 01:07 PM
Registered User
 
Join Date: Nov 2010
Location: TX
Posts: 3,579
thanks. I'll check that overhead sensor.
__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 10:10 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page