Low coolant alarm. Which one?

[Hodge]

I ordered the Redarc low coolant unit today. I bought a Redarc brake controller last week and was impressed with the quality of the construction.

All my redarc gauges and probes are really good bit of kit. So I will be going with their low coolant alarm.

Sent from Note 4

[mudski]

Getting back to this as I totally forgot about it and now I have a coolant leak. So I will be buying the Redarc unit. I knew I had a coolant leak somewhere on the motor when we were coming home from our long weekend trip when we wern't far from home and the Redarc coolant temp gauge was fluctuating a lot at about 5 degrees, and at maybe every one second intervals. Even we rolling down a hill. I thought to myself that the coolant is probably a little low and theres an air pocket in where the sensor is and the splashing coolant on the sensor would make the gauge go nuts.
So the Redarc unit is what I'll get, theres a mob not far form here who have them at a good price, so while my car is off the road for other issues, I'll do this too.

[jff45]

To fit my Redarc sensor for the coolant I cut off the bleed outlet from my alu rad and tigged a 1/8 npt bung in its place. The outlet had just been blocked off with a rubber cap.
This gives me the sensor as high up in the system as possible.
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IMG_5317.JPG

[mudski]

To fit my Redarc sensor for the coolant I cut off the bleed outlet from my alu rad and tigged a 1/8 npt bung in its place. The outlet had just been blocked off with a rubber cap.
This gives me the sensor as high up in the system as possible.
...
IMG_5317.JPG

Where have you put the unit itself John? I'm just about to embark on wiring this in.

[jff45]

Where have you put the unit itself John? I'm just about to embark on wiring this in.

Just behind the driver's side kick panel. It just fits snugly above my cruise control module.
I drilled a couple of 10mm holes in the plastic so the audible alarm can be well heard.
I used the LED earthing wire for a bright red LED in my centre console just to the left of the rear demister button.
Both work well, they sound and blink each time you start as a self test.

[mudski]

Just behind the driver's side kick panel. It just fits snugly above my cruise control module.
I drilled a couple of 10mm holes in the plastic so the audible alarm can be well heard.
I used the LED earthing wire for a bright red LED in my centre console just to the left of the rear demister button.
Both work well, they sound and blink each time you start as a self test.

Thanks John. The extra led. Do you think its necessary? Or is it just any old led you used?

Sent from my SM-P600 using Tapatalk

[jff45]

Thanks John. The extra led. Do you think its necessary? Or is it just any old led you used?

Sent from my SM-P600 using Tapatalk

Mark, the extra LED (small red 12v from Jaycar) is required if you want a good visual indication in addition to the buzzer. The only other way to have a visual is to mount the Redarc box on the dash in front of you.
IMO, the LED is discreet and really catches your eye in case you play loud music, for example. I just prefer the belt & braces approach with something that important.
Of course, it's more work..

[Batts]

Engine Saver is still offered with a discount for forum members. I got mine for $165 ($40 discount) just by asking David:

David Jones.
Enginesaver Low Water Alarms
07 47766334

[mudski]

I saw this thread it has reminded me that my Redarc unit has died. It keeps going off by itself so now its unplugged. Issue now is I cannot find the receipt to claim it under warranty.

[jff45]

I saw this thread it has reminded me that my Redarc unit has died. It keeps going off by itself so now its unplugged. Issue now is I cannot find the receipt to claim it under warranty.

Mark, check the spade connector on the sensor to make sure it has good clean contact.