my 2011 chevy hhr LT , keep entering to cooling mode ,i have changed the thermostat, the coolant engine temperature sensor, coolant reservoir tank

any idea

thanks Alvin

 

Hi Alvin, to the forums!

What do you mean by entering to cooling mode?

 

i mean my chevy hhr LT gets a warning that its entering into cooling mode
on temperture read out for my engine

 

Sounds like it's overheating badly. I cannot recall anyone here having that message. Can you get a coolant temperature from the DIC? Under what conditions do you get the message?

 

Without knowing the actual temperature or if it is running hot, it's hard to advise.
How about a little more info. How long have you owned this car ? Mileage ? When does this occur ? Under any circumstances like towing a small trailer or else ?

Anyhow. From the Owners Manual:
COOLING MODE ON
This message may display on some vehicles. Under
severe conditions, hot ambient temperatures, steep
grades, and towing, your vehicle may experience more
transmission shifting. This is temporary and normal
under these conditions. This does not require engine or
transmission service.

 

i got this car three months ago; this just started happening.
it starts the cooling mode on after about 20 minutes
its goes up and comes back down to normal

 

Have you looked at the digital temperature. There is a link to a free Owner Manual in my sig.
My first wild guess is the water pump, assuming the cooling system is full of coolant, check under the pressure cap.
Stop driving it until it is fixed. Have you noticed the severe missing and loss of power when in cooling mode? That warning means that the engine is very close to turning into a boat anchor.

 

Have you burped the coolant in the radiator?


https://www.chevyhhr.net/forums/how-...-system-60614/

 

how can i find that out burped the coolant

 

Click on the link I posted. It’s an easy process