RADIATOR WARNING LIGHT ON CITROEN BERLINGO
Discussion
This is my first post so apologies if this is in the wrong bit, but I would appreciate a bit of help.
I have a Citroen Berlingo Desire 1.9HDi and a couple of weeks ago got the radiator warning light, audible alarm and flashing STOP sign displayed on the dashboard. A quick check showed I had lost water from the system, and a local garage has recently fitted a new thermostat head to solve the problem.
Today, I have run the engine to try and defrost the windscreen and after a few minutes the same warning light and STOP sign came on.
I have checked the water level and it is fine. The system is clean, no sign of oil or any other contaminants, and anti freeze was apparently added, the water in the resevoir is not frozen.
Can anyone give me any idea why this would still be happening? What else would cause the radiator alarms to be triggered if the water level is fine?
I have a Citroen Berlingo Desire 1.9HDi and a couple of weeks ago got the radiator warning light, audible alarm and flashing STOP sign displayed on the dashboard. A quick check showed I had lost water from the system, and a local garage has recently fitted a new thermostat head to solve the problem.
Today, I have run the engine to try and defrost the windscreen and after a few minutes the same warning light and STOP sign came on.
I have checked the water level and it is fine. The system is clean, no sign of oil or any other contaminants, and anti freeze was apparently added, the water in the resevoir is not frozen.
Can anyone give me any idea why this would still be happening? What else would cause the radiator alarms to be triggered if the water level is fine?
It depends where the coolant level sensor is situated. My guess would be that the electrical connector has become oxidised and is making intermittent contact, or that the level float switch has failed. Is the engine temperature sensor showing ok? If it does not rise above 0, or hits max quickly it might be that the pump has failed.
What do you mean thermostat head? do you mean the body in which the thermostat sits? That is the only reason I can see you would replace a thermostat part for water loss.
was the stat itself done at the same time? It would probably be on the bill if it was. I'm just wondering if the stat has failed but that should have been found by the garage by cycling the engine after the repair. You should check the rad temp to confirm.
If the stat was done I would guess airlock. if it is that squish the pipes and it should bubble out. Another option may be failed impeller blades on the pump giving the cooling circuit no flow.
was the stat itself done at the same time? It would probably be on the bill if it was. I'm just wondering if the stat has failed but that should have been found by the garage by cycling the engine after the repair. You should check the rad temp to confirm.
If the stat was done I would guess airlock. if it is that squish the pipes and it should bubble out. Another option may be failed impeller blades on the pump giving the cooling circuit no flow.
Zad said:
It depends where the coolant level sensor is situated. My guess would be that the electrical connector has become oxidised and is making intermittent contact, or that the level float switch has failed. Is the engine temperature sensor showing ok? If it does not rise above 0, or hits max quickly it might be that the pump has failed.
The engine temp on the dash never shows that there is a prob, it never has gone above the 'normal' position it had when everything was ok, even when the water gets low.Is that what you mean? Sorry, my 'no idea' username is well earned!
Buzz word said:
What do you mean thermostat head? do you mean the body in which the thermostat sits? That is the only reason I can see you would replace a thermostat part for water loss.
was the stat itself done at the same time? It would probably be on the bill if it was. I'm just wondering if the stat has failed but that should have been found by the garage by cycling the engine after the repair. You should check the rad temp to confirm.
If the stat was done I would guess airlock. if it is that squish the pipes and it should bubble out. Another option may be failed impeller blades on the pump giving the cooling circuit no flow.
To be honest I dont know the answer to this. They did a pressure test when the problem started and said that there was a small valve at the end of the system which had stuck in the open position.was the stat itself done at the same time? It would probably be on the bill if it was. I'm just wondering if the stat has failed but that should have been found by the garage by cycling the engine after the repair. You should check the rad temp to confirm.
If the stat was done I would guess airlock. if it is that squish the pipes and it should bubble out. Another option may be failed impeller blades on the pump giving the cooling circuit no flow.
From what I gather this valve opened and closes as the pressure within the system raises and falls, but because it stayed open water was escaping. I was told they had to replace the thermostat head as this valve was attached to it.
One thing I forgot to mention in my original post was that when the engine was running there is quite a loud "hissing noise", as if air is escaping from somewhere, but I dont know if that is possible!
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