Hot Weather - Fan Running???
Thread Starter
Member
Joined: Jun 2010
Posts: 241
Likes: 0
From: Ohio
'10 S550 4Matic, '06 BMW M5
Hot Weather - Fan Running???
Hey Guys,
So the weather outside has been hot around here. Regularly, it gets to the mid-eights or low-nineties. As of today, my S550 has been running the main fan at what seems to be a very high rate (because it is noisy as hell) when I shut off the car and walk away. It does this if it has been running for any amount of time.
For instance, this morning I left home (so the engine was "cold") and drove to the sitter's house. That drive takes about 1.5 minutes, and is just over 1 mile away. The main fan ran for between 1-2 minutes.
So the question: Are others experiencing this in the hot weather?
My M5 does it all the time in the warmer weather. Should I be concerned at all? I feel the answer is "no," however since the fan runs so fast, it is just noisy and kinda makes my nice, classy car seem a bit stupid. 
That's all. No error lights, warnings, or codes thrown.
Thanks!
So the weather outside has been hot around here. Regularly, it gets to the mid-eights or low-nineties. As of today, my S550 has been running the main fan at what seems to be a very high rate (because it is noisy as hell) when I shut off the car and walk away. It does this if it has been running for any amount of time.
For instance, this morning I left home (so the engine was "cold") and drove to the sitter's house. That drive takes about 1.5 minutes, and is just over 1 mile away. The main fan ran for between 1-2 minutes.
So the question: Are others experiencing this in the hot weather?
My M5 does it all the time in the warmer weather. Should I be concerned at all? I feel the answer is "no," however since the fan runs so fast, it is just noisy and kinda makes my nice, classy car seem a bit stupid. That's all. No error lights, warnings, or codes thrown.Thanks!
Member
Joined: Aug 2010
Posts: 170
Likes: 3
From: Tampa, FL
2018 C43 Convertible
If it does stop after a while it should be OK. I don't know about all these electronic thermostats but, in regular cars fans are (indirectly) tied to thermostats and when they go bad sometimes the fan runs unneccessarily.
A running fan is always better than a stopped fan
A running fan is always better than a stopped fan
Super Member
Joined: Jan 2008
Posts: 650
Likes: 24
From: Texas
2015 White/brown Nappa S550, '13 S550 4 matic, 11 S550 sold, '10 S550 Sports BLACK 08 S550 P3 sport
Hey Guys,
So the weather outside has been hot around here. Regularly, it gets to the mid-eights or low-nineties. As of today, my S550 has been running the main fan at what seems to be a very high rate (because it is noisy as hell) when I shut off the car and walk away. It does this if it has been running for any amount of time.
For instance, this morning I left home (so the engine was "cold") and drove to the sitter's house. That drive takes about 1.5 minutes, and is just over 1 mile away. The main fan ran for between 1-2 minutes.
So the question: Are others experiencing this in the hot weather? My M5 does it all the time in the warmer weather. Should I be concerned at all? I feel the answer is "no," however since the fan runs so fast, it is just noisy and kinda makes my nice, classy car seem a bit stupid. That's all. No error lights, warnings, or codes thrown.
Thanks!
So the weather outside has been hot around here. Regularly, it gets to the mid-eights or low-nineties. As of today, my S550 has been running the main fan at what seems to be a very high rate (because it is noisy as hell) when I shut off the car and walk away. It does this if it has been running for any amount of time.
For instance, this morning I left home (so the engine was "cold") and drove to the sitter's house. That drive takes about 1.5 minutes, and is just over 1 mile away. The main fan ran for between 1-2 minutes.
So the question: Are others experiencing this in the hot weather?
My M5 does it all the time in the warmer weather. Should I be concerned at all? I feel the answer is "no," however since the fan runs so fast, it is just noisy and kinda makes my nice, classy car seem a bit stupid. That's all. No error lights, warnings, or codes thrown.Thanks!
dont worry completely normal.
Member
Joined: Aug 2010
Posts: 170
Likes: 3
From: Tampa, FL
2018 C43 Convertible
I don't know if relevant but check this out (credit to Konigster):
P-B-07.61/71 JUL07 Check Engine light is illuminated and the radiator fan runs constantly this fault may occur when the engine is at operating temperature and is then switched off and restarted immediately. The temperature sensor will be checked with DAS. Note you should always wait longer than two seconds prior to restarting the vehicle.
P-B-07.61/71 JUL07 Check Engine light is illuminated and the radiator fan runs constantly this fault may occur when the engine is at operating temperature and is then switched off and restarted immediately. The temperature sensor will be checked with DAS. Note you should always wait longer than two seconds prior to restarting the vehicle.
Super Member
Joined: Jan 2008
Posts: 650
Likes: 24
From: Texas
2015 White/brown Nappa S550, '13 S550 4 matic, 11 S550 sold, '10 S550 Sports BLACK 08 S550 P3 sport
I don't know if relevant but check this out (credit to Konigster):
P-B-07.61/71 JUL07 Check Engine light is illuminated and the radiator fan runs constantly this fault may occur when the engine is at operating temperature and is then switched off and restarted immediately. The temperature sensor will be checked with DAS. Note you should always wait longer than two seconds prior to restarting the vehicle.
P-B-07.61/71 JUL07 Check Engine light is illuminated and the radiator fan runs constantly this fault may occur when the engine is at operating temperature and is then switched off and restarted immediately. The temperature sensor will be checked with DAS. Note you should always wait longer than two seconds prior to restarting the vehicle.
it is normal.
