Cooling low fan is not working

Radiator cooling fans not working ?

There are some problems the diagnostics can show. I want to say that this sounds like a water leak in the heads and it is fouling the plugs. But there should be some "check engine" activity.

There is also a limp home mode which occurs when a car overheats. It is suppose to limit high RPM but not kill the engine.

Over heating is one issue and stalling is the other. You might have a bad cooling fan or relay for the cooling fan, but it usually will not stall the motor. You should have diagnostic codes. if so, have then scanned.

8 Things that Can Cause Your Car to Overheat..
> The coolant level is low.
>You have a leak in the engine cooling system
>The thermostat is bad.
>The water pump is failing
>Your cooling system has trapped air
>The radiator cooling fan is not working properly.
>The radiator core has become clogged.
>You have a blown head gasket.

Cars usually overheat when the thermostat is faulty, coolant level is low, or the water pump fails. If your cooling fan on the radiator does not kick on shortly after the engine reaches operating temperature, you may have a bad cooling fan, cooling fan relay, or cooling fan fuse. If your engine is overheating, start by checking the fluid level, and installing a new thermostat.

A blower motor resistor is the device that controls a car's cabin heating and air conditioning unit's fan speeds. This usually won't cause the engine to overheat, your A/C fan may not function or only function at one speed. Here is a Blower Motor Resistor from Autozone: http://www.autozone.com/autozone/parts/2003-Ford-Focus/A-C-Heater-Blower-Motor-Resistor/_/N-jk8uvZ91tag

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

sounds like possibly the coolant fan inop check that

Check the coolant temperature with the car stopped. At idle with the hood up keep the thermometer in the coolant. Confirm if the coolant is not overheating but the engine is!!

Run the A/C keeping the thermometer in the coolant and allow the fan to kick on.

If with the A/C on the engine doesn't overheat then it confirms that the low speed on the fan motor is not working. Read the description of the Taurus where the low speed is used for normal operation when temperature is required but the high speed is activated when the A/C is on. The circuit is simple.

In your case the low speed has to be activated for the A/C to go into the high speed. The fact that the high speed is working and low speed is not indicates the low speed of the fan is defective.

Other problems such as the thermostat or plugged cooling system(radiator clogged) could be the root problem!

Hope this helps?

You may be developing a worn head gasket which can allow oil to flow into the engines cooling jacket. If your engine is running rough this is usually a good idication that there is a head gasket leak.

not sure what the sound was, but if there's a blown head gasket, the water that gets in a cylinder won't compress and it won't turn over very well and sometimes not at all. that may be what they mean by "holding compression".

check for water in the oil...it'll foam up on the dipstick,

Get a second opinion from a reputable shop other than Ford.... If it's a head gasket, it's much cheaper than an engine swap, if that's what you're thinking...

On my 2001 Focus Zetec 2.0L, the radiator fan only worked with the air conditioning turned on (as in no low speed - engine would overheat while idling or in traffic, but was fine as long as the A/C was on). The fix was to replace the radiator fan resistor assembly located in the fan shroud between the fans.