Radiator Fan SOMETIMES do not turns on and it is filling and dropping temp lights on the dash and beeping an alarm

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My Name: frankoprifti

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Posts: 17
Joined: Tue Jan 19, 2021 8:36 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.1
Fuel Type: BiFuel (LPG-Petrol)
Mileage: 125000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: TU1 (60 PS)
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Hey there, I have a 2003 C3 with Petrol+LPG. Most of the time the fan runs completely fine. But sometimes the temperature signals on the dashboard start lighting and dropping down to 3 level like an alarm to show that its not working, its not overheating as I am understanding but just seeing this signal and a little beep for alarm, then i have to open the hood disconnect the cable that has two thick wires and reconect them again and it start working. What am i dealing with here? Hoping someone can help me!
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My Name: Arfur Dent

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Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
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Engine name: DV4 16-valve diesel (90 PS)
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frankoprifti wrote: Tue Jan 19, 2021 8:42 am Hey there, I have a 2003 C3 with Petrol+LPG. Most of the time the fan runs completely fine. But sometimes the temperature signals on the dashboard start lighting and dropping down to 3 level like an alarm to show that its not working, its not overheating as I am understanding but just seeing this signal and a little beep for alarm, then i have to open the hood disconnect the cable that has two thick wires and reconect them again and it start working. What am i dealing with here? Hoping someone can help me!
Hello

Is the level of the coolant in the coolant container between the mini and maxi marks when the engine is cold?


Citroen C3 coolant level.check
Citroen C3 coolant level.check
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My Name: frankoprifti

Contributor
Posts: 17
Joined: Tue Jan 19, 2021 8:36 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.1
Fuel Type: BiFuel (LPG-Petrol)
Mileage: 125000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: TU1 (60 PS)
Has thanked: 3 times
Been thanked: 1 time

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Yes it is!
My Name: frankoprifti

Contributor
Posts: 17
Joined: Tue Jan 19, 2021 8:36 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.1
Fuel Type: BiFuel (LPG-Petrol)
Mileage: 125000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: TU1 (60 PS)
Has thanked: 3 times
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Arfur Dent wrote: Tue Jan 19, 2021 9:44 am
Hello
Is the level of the coolant in the coolant container between the mini and maxi marks when the engine is cold?

Citroen_C3-coolant-level.jpg
Would it be a problem if it is more than max. I mean when it is cool the level is NEAR MAX, Could it be a problem if while running it increases?
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My Name: Ozvtr

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Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
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Engine name: TU3 (75 PS)
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The green coolant outlet temperature sensor on the thermostat housing are known to fail.
You could try replacing that.
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My Name: Arfur Dent

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Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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frankoprifti wrote: Tue Jan 19, 2021 11:08 am
Arfur Dent wrote: Tue Jan 19, 2021 9:44 am
Hello
Is the level of the coolant in the coolant container between the mini and maxi marks when the engine is cold?

Citroen_C3-coolant-level.jpg
Would it be a problem if it is more than max. I mean when it is cool the level is NEAR MAX, Could it be a problem if while running it increases?
No, not a problem if it a bit high, not enough to cause you a problem like this.

A low level can give flashing temperature lights. The sensor on the side of the tank with mini and maxi marks is the sensor. They can become contaminated with oil when the head gasket fails. The sensor is easily removed, but you will loose some coolant.
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My Name: frankoprifti

Contributor
Posts: 17
Joined: Tue Jan 19, 2021 8:36 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.1
Fuel Type: BiFuel (LPG-Petrol)
Mileage: 125000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: TU1 (60 PS)
Has thanked: 3 times
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Ozvtr wrote: Tue Jan 19, 2021 10:21 pm The green coolant outlet temperature sensor on the thermostat housing are known to fail.
You could try replacing that.
Can someone tell me how can i run the radiator fan manually with a switch? What wires should i connect together to make it fun in a command
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My Name: Arfur Dent

Guru
Posts: 3340
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 271 times
Been thanked: 114 times

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frankoprifti wrote: Thu Jan 21, 2021 6:39 pm
Ozvtr wrote: Tue Jan 19, 2021 10:21 pm The green coolant outlet temperature sensor on the thermostat housing are known to fail.
You could try replacing that.
Can someone tell me how can i run the radiator fan manually with a switch? What wires should i connect together to make it fun in a command
There are many different fan systems fitted to the C3 models. You will need to identify the fan system you have fitted. They are often computer controlled, so you need a good understanding of what you are doing without doing even more damage or bringing up more error codes.

Best to fix the fault of you can.
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User avatar
My Name: Ozvtr

Moderator
Posts: 956
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 37 times
Been thanked: 256 times

Post

frankoprifti wrote: Thu Jan 21, 2021 6:39 pm Can someone tell me how can i run the radiator fan manually with a switch? What wires should i connect together to make it fun in a command
As Arfur says, there are a couple of different versions of the fan assembly and I would need to know which version you have.

You will find the the thermo fan will run at full speed each time the display goes mad, but will run as normal at all other times. So if you are intending to install a switch to cut the fan off...that's not a good idea. You run the risk of forgetting that you switched the fan off and could over heat the engine.

I still recommend replacing the temperature sensor, it's simple and not that expensive. Installing a switch will not stop the display going wild or the car beeping at you.
This is the type of sensor you are looking at but you should confirm the engine type and year.
https://www.ebay.co.uk/sch/i.html?_from ... .4+1338+a6
My Name: frankoprifti

Contributor
Posts: 17
Joined: Tue Jan 19, 2021 8:36 am
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.1
Fuel Type: BiFuel (LPG-Petrol)
Mileage: 125000
Trim Level: NA
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: LHD (Europe)
Engine name: TU1 (60 PS)
Has thanked: 3 times
Been thanked: 1 time

Post

Ozvtr wrote: Thu Jan 21, 2021 10:08 pm
frankoprifti wrote: Thu Jan 21, 2021 6:39 pm Can someone tell me how can i run the radiator fan manually with a switch? What wires should i connect together to make it fun in a command
As Arfur says, there are a couple of different versions of the fan assembly and I would need to know which version you have.

You will find the the thermo fan will run at full speed each time the display goes mad, but will run as normal at all other times. So if you are intending to install a switch to cut the fan off...that's not a good idea. You run the risk of forgetting that you switched the fan off and could over heat the engine.

I still recommend replacing the temperature sensor, it's simple and not that expensive. Installing a switch will not stop the display going wild or the car beeping at you.
This is the type of sensor you are looking at but you should confirm the engine type and year.
https://www.ebay.co.uk/sch/i.html?_from ... .4+1338+a6
I want to install a switch that turns the fan on manually for the times that the coolant temperature switch doesnt do its job. So i dont have to open the hood and disconnect and reconnect the wires to make it work.

Of course I'm going to change the sensor but as long as I'm not too sure which part is having the problem in my car, I want to be sure and add a switch so till I find the problem I have the option to manually start the FAN to prevent overheating.
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