Question about Raypak Rp2100 Pool & Spa Heater Lonox 407k Btu Natural Gas Polymer Header Digital Rp407aenc

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SNS appears on digital screen - Raypak Rp2100 Pool & Spa Heater Lonox 407k Btu Natural Gas Polymer Header Digital Rp407aenc

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This indicates the the 2 installed temp sensors are having a reading the is more than 2 degrees in difference. It is either a failed sensor, or one of the sensors is not fit snuggly into the header.
To test a sensor, turn your multimeter on OHMS or RESISTANCE and connect probes to each wire. at 80 degrees, the sensor should read 93 OHMS. At 70 degrees it should read 118 OHMS
at 60 degrees it should read 153 OHMS

Posted on Oct 28, 2010

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1 Answer

Code sns appears


temp sensor out of range replace

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I get sns on my heater


SNS on Raypak heaters means the following:

1. Water temp is below 36 degrees F, or above 110 degrees F.

2. The sensor contains 2 thermistors. If they are more than 2 degrees aparts, an SNS failure will occur. Replace sensor.

3. Loose or corroded connection at P1 on the main CPU board (right behind the LCD screen)

4. If the sensor is not mounted ALL THE WAY into the JACO fitting (on top of the header) it will give a false reading.

It is more likely than not, that you need to replace the temperature sensor. Part number 009577F.

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1 Answer

Rheem 206 propane heater will not fire has code #sns what is the problem? the water is 65 degree.


SNS means the temp sensor is out of acceptable range. Could be the following:

1. Water temp is below 36 degrees F
2. The sensor contains 2 thermistors, if they are more than 2 degrees apart and SNS failure will occur
3.Loose or corroded connection at P1 on the main board
4. If the sensor has come out of the JACO fitting on the header, it may read a SNS failure.

Solution, visually inspect the connections for corrosion. If it looks ok, then replace the temp sensor.

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When I put power to my unit. A Sn code appears. Great Lakes spa 1996 260E balboa wiring


If the SnS or Sn Message is Alternating with the Water Temperature on the Display, it is a Possible Sensors Out of Sync Message.
If the SnS or Sn Message is Blinking or Flashing OFF and ON without showing Water Temperature, it is a Verified Sensors Out of Sync Message.


http://service.balboa-instruments.com/ErrorCode/ for code info

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1 Answer

My raypak heater is not working I have power but the screen is showing an error message SNS. What do I look for what sensor is not working.


Here is the link for the manual for your boiler.

http://www.raypak.com/uploads/6000.59R.pdf

SNS Sensor failure, Water temp. below 36°F
or above 110°F - The water temperature sensor has failed or a wire is broken. (page 35)

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1 Answer

What does SMS on digital screen mean?


I believe the code is SNS which is sensor failure. It thinks your pool water is either above 110 degrees F or below 36 degrees F. Post the exact model/serial and will assist you further. The sensor is not expensive and somewhat easy to change if you are mechanically inclined. If not, I would strongly advise you to call your local mechanical contractor to service this boiler and it does not have to be a pool company, it can be your furnace contractor. Or let me know where you are located and I can recommend someone from that area.

Thanks
Richard

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