coolant visit workshop

Nov 18, 2018 | 04:52 PM

beers

Thread Starter

Newbie

Joined: Nov 2018

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c240

coolant visit workshop

hello I have a w203 or 01 c240 and i am getting coolant visit workshop fan comes on as it should at start up.when driving car does not warmup it rose to 60degrees celcius and drops back to just above 40 and i have no heat to speak of . I am pretty sure tstat is bad but not sure why that would cause coolant visit workshop. thanks for any help

Nov 19, 2018 | 11:05 AM

mtnman82

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Joined: Dec 2005

Posts: 1,055

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From: SoCal. Desert

'16 E350, gone: '03 c230k

I assume you've checked the coolant reservoir for coolant level? This can also come on if your wiper fluid becomes low. These are two of the simple things it could be, there are of course other things which could lead to this.

Nov 19, 2018 | 01:03 PM

tjts1

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Joined: May 2017

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C320

Quote:

Originally Posted by beers

Because the ECU has minimum temp, maximum temp and time to temp alarms. Get the thermostat replaced.

Nov 19, 2018 | 10:49 PM

shan

Member

Joined: Jan 2007

Posts: 97

Likes: 4

From: Malaysia

W203 (2007), W120 (1962)

Your symptoms seem to directly point to the thermostat which stays in the open position when faulty.

Nov 20, 2018 | 10:08 AM

beers

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c240

I drained coolant and changed temp sensor and thermostat. Filled back up and after going for a ride the visit workshop malfunction is gone. I hope it stays that way. Thanks for everyone’s help!

Nov 21, 2018 | 08:04 PM

beers

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c240

I spoke to soon. Temperature is rock steady now at 87 Celsius. Coolant is full. Windshield wiper is full. Fan seems to be cycling as it should and coolant visit work shop came back on. I am at a total loss