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Old 12-03-2015, 03:34 PM   #1
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"Low coolant" sensor

My "low coolant" sensor flashes for a while, then slowly quits flashing.
Sensor is mounted in the coolant reservoir and of course is no longer made.
Any thoughts on where one might be found?
OR; if I just disconnected it would it affect the ECM?
TU for any ideas

RonPeeps
00 Dyn
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Old 12-03-2015, 03:44 PM   #2
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Quote:
Originally Posted by Ron Peeps View Post
My "low coolant" sensor flashes for a while, then slowly quits flashing.
Sensor is mounted in the coolant reservoir and of course is no longer made.
Any thoughts on where one might be found?
OR; if I just disconnected it would it affect the ECM?
TU for any ideas

RonPeeps
00 Dyn
Make and model of your coach would help...
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Old 12-03-2015, 03:48 PM   #3
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Quote:
Originally Posted by Ron Peeps View Post
My "low coolant" sensor flashes for a while, then slowly quits flashing.
Sensor is mounted in the coolant reservoir and of course is no longer made.
Any thoughts on where one might be found?
OR; if I just disconnected it would it affect the ECM?
TU for any ideas

RonPeeps
00 Dyn
Can the coolant sensor on your 2000 Monaco Dynasty be cleaned? Most of these sensors just give a ohm reading that changes to send a signal.
1) Maybe cleaning it would fix it.
2) it might be possible to find a similar sensor to replace it
3) Replace it with a resistor of the proper value and check the coolant yourself.
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Old 12-03-2015, 03:51 PM   #4
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If it works like I would guess it does, disconnecting it might give you the same light. I'm sure you have coolant in there and I would guess it works by using the coolant to complete the circuit between the probes in the tank. If they are somehow dirty that could be it. Or possibly a loose connection. Hopefully someone here knows for sure.

What motor does your coach have. That may help identify the problem. Good luck.
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Old 12-03-2015, 03:57 PM   #5
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If it is a two wire sensor clip the two wires together with a scotch lok. That will complete the circuit. No more problem. All you would have to do is check the coolant level yourself occasionally. I know this will work because I did it on several OTR trucks and a Discovery MH.
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Old 12-03-2015, 05:59 PM   #6
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In 2014 I had to change my surge tank, the old one had developed numerous cracks and was weeping coolant. I had patched it and it held ~5 years but I started to get concerned.

The new tank has a different type of sensor, and the mount location is lower on the side through a threaded port.

Here is the sensor I used
New Ford Low Coolant Level Warning Sensor XC35 10D968 AA 95 98 F800 F700 RV | eBay

Problem is your sensor come in on the top. You may be able to get some sort of threaded adapter you could put on the side of your tank using O-rings to seal.

Don't know if you need a new tank but it may pay to look at it.
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Old 12-03-2015, 10:03 PM   #7
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"Low coolant" sensor

Changed mine out a couple months ago on my 16 year old coach. Called factory and all they asked was two or three wire.. Of course mine had the more expensive 3 wire. Unscrewed old and screwed new one I'm,good,to go.


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Old 12-03-2015, 10:30 PM   #8
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If you can remove it, take a scotchbrite pad to it and reinstall. Often, cleaning the surface will make them work again.
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Old 12-04-2015, 12:02 PM   #9
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Surprised to hear it is no longer made - coolant level sensors are a commodity and used in thousands of vehicles. I would suspect most truck repair shops, e.g. a Freightliner or Sprtan or Cat shop, could come up with one, or a substitute.
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Old 12-04-2015, 03:30 PM   #10
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A picture of the sensor??
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Old 12-06-2015, 11:49 AM   #11
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Thank You All!
Bet one of these ideas works.
Will advise

Ron Peeps
2 k Dyn
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Old 12-06-2015, 08:23 PM   #12
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If it flashes for awhile when it's cold and stops after its hot it may be just slightly low and need a small amount added.


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Old 01-07-2016, 06:35 PM   #13
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Try here:
https://www.rvchassisparts.com:8443/...is/runApp?id=5
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