Cooling fans not working

[Islandman]

Been struggling for weeks with my car overheating.  I've replaced the fan control module twice with a Gates unit and replaced the entire fan system with two new fan motors.  The fans quit after a couple of days and the car overheats.   Neither fan is turning when I inspect them.  What am I missing and what could be going on?   I've been told to consider replacing the ECM but obviously that is a huge expense for the car.   Mine is a 2006 with 85,000 miles, trying to keep it running for my daughter but am on the verge of giving up.  Hope you have some great ideas for me.  Many thanks in advance.

Edited October 14, 2021 by Islandman
typo

[Jimbov8]

Stop throwing money at it on the same parts. Investigate the cooling system with the view that you may need to change both thermostats and possibly the water pump.

[Islandman]

agreed.  Water pump is new.  Can you give me details on the two thermostats?   Thanks. 

[Jimbov8]

Coolant thermostat and Oil cooler thermostat.

[LongPhil]

Interesting. I am a proud new owner of a 2005 x type 2.2 diesel a car I always wanted to drive. Everything works ok but I noticed that the water temp rarely goes above a quarter and when it does it falls back again. I have read that the Oil cooler thermostat may require replacing but then again I have read this symptom is quite normal. Perhaps someone could give me some advice on whether I should be concerned or not.

[Jimbov8]

It is indeed indicative of a failed thermostat. If changing one then best to change both. The temperature gauge should be just on the halfway mark normally.

[LongPhil]

Thank you. Changing them both would seem the most sensible way. I'll get it booked into my local garage and get back as soon as.