Heater started blowing cool air rather than warmer air.

105

Asked by Oct 26, 2013 at 12:31 PM about the 2000 Mercedes-Benz SL-Class SL 500

Question type: General

No problems until yesterday. Heater started blowing warm air and after 20 minutes started
blowing cool air. The auto was not on, as usual I was using the fan to control the air flow. I
elevated the temp to 80 to get the heater to blow barely warm air.

4 Answers

I'd look at the coolant level....and a stuck thermostat~

2 of 2 people found this helpful.
105

If it was a stuck thermostat wouldn't the temp gauge be affected also? The temp gauge is normal.

3 of 3 people found this helpful.

if the coolant level is normal...the coolant itself is not "rust-water" would "belch" the cooling loop so that it is not air-bound~ make sure the coolant level is okay. the thermostat opens up the cooling loop to the heater core...you MAY not overheat....rust water/clobbered thermostat...aside from air-bound can think of nothing else that it could be~

1 of 1 people found this helpful.

run without the thermostat for a spell and check to see if the heater core is plugged....a garden hose on one of the coolant loop connections with the output going into 5 gal buckets for recapture might happen if the heater core is clobbered with rust~

1 of 1 people found this helpful.

Your Answer

SL-Class

Looking for a Used SL-Class in your area?

CarGurus has 3,405 nationwide SL-Class listings starting at $4,500.

ZIP:

Mercedes-Benz SL-Class Experts

  • #1
    bobkat
    Reputation
    1,350
  • #2
    Michael Kane
    Reputation
    460
  • #2
    twhobie
    Reputation
    460
View All

Related Models For Sale

Used Mercedes-Benz S-Class
120 Great Deals out of 7,783 listings starting at $1,200
Used Porsche 911
118 Great Deals out of 5,221 listings starting at $12,995
Used Chevrolet Corvette
133 Great Deals out of 16,101 listings starting at $3,000
Used Mercedes-Benz SLK-Class
61 Great Deals out of 1,320 listings starting at $1,408
Used Mercedes-Benz E-Class
587 Great Deals out of 22,176 listings starting at $1,800
Used Jaguar XK-Series
35 Great Deals out of 645 listings starting at $4,995
Used Mercedes-Benz C-Class
813 Great Deals out of 25,943 listings starting at $1,500
Used Porsche Boxster
51 Great Deals out of 1,276 listings starting at $3,495
Used Mercedes-Benz CL-Class
22 Great Deals out of 503 listings starting at $4,580
Used Mercedes-Benz CLK-Class
35 Great Deals out of 1,116 listings starting at $2,995

Used Cars For Sale

2017 Mercedes-Benz SL-Class For Sale
110 listings starting at $71,800
2016 Mercedes-Benz SL-Class For Sale
68 listings starting at $49,852
2015 Mercedes-Benz SL-Class For Sale
9 Great Deals out of 209 listings starting at $43,995
2014 Mercedes-Benz SL-Class For Sale
3 Great Deals out of 209 listings starting at $42,995
2013 Mercedes-Benz SL-Class For Sale
199 listings starting at $36,300

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.