Technical Radiator fan

[L3TH4L1TY]

Hi,

Last year I had a coolant issue, it basically overheated, killed the battery, and although battery replaced, coolant not leaking since, I've not had the fan operate since then.

The temp gauge will sit at halfway, but lately especially in this weather, the engine bay seems excessively hot.

I've ran 12v to the fan and it spins up, checked fuses related to it, relays worked when I tested although will test again for resistance.

I know some will say "if it's halfway, etc, it's fine", but surely, in this near 30 Celsius heat, with aircon (manual) and some hard driving I should definitely be having that fan come on?

Car is a 1.4 Tjet, attached fuse box if anyone could help identify the fan relay.
Is there a separate temp sensor responsible for dashboard gauge to the one on thermostat housing? Currently thinking thermostat might be stuck open or something.

 

[eeeno]

Trust me, the thermostat is working if the engine reaches operating temperature and the needle is at the middle.

The dead battery and coolant leak aren't connected, so source of the problem still needs to be fixed. Broken reservoir cap, leaky thermostat housing gasket are quite usual.

ECU monitors radiator fan function and if there's a fault, it registers a fault code or sometimes runs the fan all the time. Have you read fault codes and checked obd live data for engine coolant temperature sensor values?

 

[chris3234]

Leave to car ideling on a driveway after a drive on a warm day

Keep and eye on the temp gauge but the fan should kick in after a few minutes in that situation if to dosnt and you see the temp gauge go above Normal you know there's an issue

 

[mikitzca]

I have experienced similar problem on my 1.3 mjet 66kw. it turned to be fan resistor attached to the fan housing that is triggering first fan speed. no meter you tried with 12 v. the fan itself is ok. the fan's second speed is triggered by ecu itself and it will turn once the temperature is high. that's why your engine is hot. you can easily check resistor functioning (the first fan speed) by turning on air con and see if fan is starting to spin soon as you turn on air con (some 15-30 sec). if not, than you should replace it.