There’s also the possibility that the gauge is faulty. I fought the intermittent “blinking red light of death” for over 2 yrs and read that the gauge fails. Bought a new one, opened the tack cluster, replaced the gauge and all’s well for last 8 yrs or so. Good luck on yours. 

Dan
Country Homes Camper, the Huckleberry Sky

> On Apr 24, 2022, at 11:34 AM, OlRivrRat <OlRivrRat@comcast.net> wrote:
> 
>         Thanks You Guys for the input & thank You Mark for the HeadsUp on
> 
> the Temp 1 Snsr ID ~ I've had Vanagons in My life for 29Yrs & for most of
> 
> those Yrs have IDd the Temp Gauge Snsr as Temp! probably due to it being
> 
> the nextdoor neighbor of the Temp 2 & I’ve never even considered that the
> 
> IATS had a Temp Snsr # ~ 
> 
>        I’ve always thought it strange that the Temp 2 Snsr is IDd as #2 since
> 
> it seems play the Most Important roll of the 3 as far as Engine Performance
> 
> is concerned ~ I've long felt that Temp2 should be Temp1, the IATS should
> 
> be Temp2 & the Gauge Sender/Sensor should be Temp3 ~
> 
>        So back to Original ? > What in the Temp3 Snsr connection would allow
> 
> it to send Good (& Norm OpTemp) Data to the Gauge while @ the same time
> 
> cause the LED to blink ~ I have accidentally created this condition twice on 1
> 
> friends Van & have another that is doing similar but have not gotten My hands
> 
> back on that 1 yet to try to see if the LED will stop blinking by making sure that
> 
> the connection is optimal ~
> 
> 
>> On 24 Apr , 2022, at 12:25 AM, Mark Drillock <madvws@COX.NET> wrote:
>> 
>> The answer is that temp gauge led is first and foremost an "over
>> temperature warning" led.
>> 
>> The coolant level warning aspect was added on later as a secondary
>> function of the same led.
>> 
>> 
>> Also the coolant gauge temp sender is absolutely NOT the Temp 1 sensor.
>> 
>> The Temp 1 sensor is in the AFM to tell the ECU the intake air temp.
>> 
>> 
>> Mark
>> 
>> 
>> 
>>> On 4/22/2022 1:06 PM, OlRivrRat wrote:
>>> ..........
>>> 
>>>        & part of question that I forgot to ask > Why would the Temp 1 Snsr have
>>> 
>>> any influence on the LowLevel LED ~