Heat blowing cold air and radiator fan turns on fast
10-06-2012, 06:14 PM
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e500
Heat blowing cold air and radiator fan turns on fast
2008 e550 with 42k I replace the raditor and added fluid do I have to bleed the system? If not what else can it be thanks
Last edited by slowfiero; 10-06-2012 at 06:17 PM.
10-09-2012, 10:09 PM
#4
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2018 GLC300 4Matic; 2005 C55; 2003 360 Modena
Lets rule more stuff out...
A/C on? (Could be causing the radiator fan to run), and help mask an overheat.
Manually override auto climate function to force full heat?
Car driven long enough to ensure it doesn't overheat?
How much coolant in expansion tank?
Did you run thru warmup with expansion tank cap off?
A/C on? (Could be causing the radiator fan to run), and help mask an overheat.
Manually override auto climate function to force full heat?
Car driven long enough to ensure it doesn't overheat?
How much coolant in expansion tank?
Did you run thru warmup with expansion tank cap off?
10-10-2012, 07:19 PM
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e500
No AC is off how do i over ride climate function, does have enough coolant in the reservoir. And the warm up is it just running the car with the top off until the air get out of the lines?
Lets rule more stuff out...
A/C on? (Could be causing the radiator fan to run), and help mask an overheat.
Manually override auto climate function to force full heat?
Car driven long enough to ensure it doesn't overheat?
How much coolant in expansion tank?
Did you run thru warmup with expansion tank cap off?
A/C on? (Could be causing the radiator fan to run), and help mask an overheat.
Manually override auto climate function to force full heat?
Car driven long enough to ensure it doesn't overheat?
How much coolant in expansion tank?
Did you run thru warmup with expansion tank cap off?
10-10-2012, 10:51 PM
#6
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2018 GLC300 4Matic; 2005 C55; 2003 360 Modena
Pick a vent setting manually - center is easiest to test. Manually adjust temperature to highest temp setting possible. Climate control fan speed doesn't really matter. This will ensure that the heater control valve is open (if functioning properly). From a cold start a bleed method is possible by reaching operating temp with the expansion cap off. Then cap it and drive the car to increase coolant flow better than idle or briefly revving the engine.
Does the radiator fan immediately turn on high, even when the car is cold?
Does the radiator fan immediately turn on high, even when the car is cold?
10-11-2012, 12:05 AM
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e500
No the fan does not come on right away, I will drive like 7 miles then would come on high. Im going to do the cold bleeding torm.
Pick a vent setting manually - center is easiest to test. Manually adjust temperature to highest temp setting possible. Climate control fan speed doesn't really matter. This will ensure that the heater control valve is open (if functioning properly). From a cold start a bleed method is possible by reaching operating temp with the expansion cap off. Then cap it and drive the car to increase coolant flow better than idle or briefly revving the engine.
Does the radiator fan immediately turn on high, even when the car is cold?
Does the radiator fan immediately turn on high, even when the car is cold?
