The symptom scenario that You describe can also be caused by

Dirty Probes on the Sensor ~

> On 7 Aug , 2021, at 8:04 AM, Tom Neal <tneal4242@gmail.com> wrote:
> 
> This doesn’t sound like your problem but does fill out the operational picture.
> 
> The temp sensor light should blink a few times when the key is turned on, then turn off.
> 
> Then if it starts blinking again, one of the reasons might be insufficient coolant ratio in the fluid so the sensors don’t pick up a low enough resistance.  I had to add pure coolant to get it to stop.
> 
> Tom