Question about Dream Maker Spas Dream Maker Ez Spa Hot Tub

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No heat sensor

Display reads Sn, which means "Non functional high temp sensor".

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  • docsquared Mar 24, 2009

    The spa is only a year old and suddenly the Sn message appears. What do I do?

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  • 125 Answers

You need a new high limit sensor for your control box. What is the model number of the control box?

Posted on Feb 26, 2009

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I have just replaced my circuit board (balboa 53247) for my eclipse hot tub and as soon as I plugged the unit in, I got an OH reading from the top-side control. Then I noticed that if I pulled the temp....


Unfortunately, I would have started with the sensors and then escalated from there. A hot tub is one of those items that I generally recommend hiring a technician to sort out, it's just flat not worth the headache of troubleshooting without the know-how.

As for your particular problem, the OH code on a Balboa control pack is "O.ver H.eating" it means that the heat sensor detected high temp and shut down to prevent damage to the system (as well as cooking you like a pink lobster) The sensor could be bad or the control board could be malfunctioning. A new sensor is $75-85 if memory serves me and is relatively easy to replace. one sensor is in the heating tube and the other is screwed into the tub shell to monitor tub temp. I would suggest new sensors, both of them because when one goes out the other usually isn't far behind. Make sure you shut the power to the tub off at the breaker box before doing any kind of tub repair. If you have shutoff valves on your tub you can replace the internal one without draining the tub. the one in the shell you need to drain to replace (at least to the sensor hole level) I hope this helps you to get your tub working properly again, if you still experience issues after this, I suggest biting the bullet and calling in a tech. Thanks for your question =)

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1 Answer

I have a Dream Maker X400 hot tub that wasn't used for a year or so, I replaced all of the jet heads and filled it - when I started it the light starting flashing on and off with a clicking sound coming...


Hello, and thanks for the question. Your error code is actually "SN" not "5N" but they are sometimes difficult to discern on the LCD topside display. The SN error code is for a Non-functional High temperature sensor which automatically kicks the heater off and trips the breaker. You can purchase new sensors for $75-$85 (it could be more, my pricing index is quite a few years out of date) I'm not sure where the sensor is located in that particular tub, although it is most likely in the heating canister. Make sure the power is off at the breaker before attempting any tub repair. if you have shut-off valves to the heating canister you may not have to drain the tub, remove the heating can and replace the sensor you will have to plug/unplug the sensors from the power pack/circuit board. I hope this helps =)

Oct 27, 2013 | Pool & Spa Heaters

1 Answer

Display code p=


Make sure the spa is not on sleep mode "SLP" or economy mode "ECO". Without knowing what type of spa you have it's hard to diagnose but it's possible your pressure sensor or high limit sensor it temporarily out of balance. If that's the case, it will resolve itself. If the problem persists you have a faulty faulty pressure switch or sensor.

May 05, 2013 | Pool & Spa Heaters

1 Answer

Water temp is 140 degrees, motor running and display shows code Sn


I'm not sure which system you have but if your water temp sensor is accurate you have a runaway heater. There are several safeguards internal to the heater that are supposed to prevent this from happening. Max water temp should be 104F. So if your low limit, high limit, redundant limit (if one), and t-stat were working ANY ONE of them should have shut down the heat. Get a qualified tech out to troubleshoot it. This heater has either been rigged at some point, or the gas valve is defective. In either case it is in a very hazardous condition and should not be used!

Dec 29, 2012 | Pool & Spa Heaters

1 Answer

We are getting the error message of NON FUNCTIONAL HIGH TEMP SENSOR. Does anyone know how to fix this on the Dream Maker Spa B6L series?


Not much to go on but try opening the drain valve for a few seconds. If you have an air lock this give you a high temp code. When you open the drain it will break the air lock and start it pumping again.

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1 Answer

THE ERROR CODE READS SN. (NON FUNCTIONAL HIGH TEMP SENSOR) THE TEMP SENSOR HAS BEEN CHANGED. STILL READS SN. I HAVE TRIED UNPLUGGING AND REPLUGGING. BUT NO RESPONSE. WHAT ELSE COULD I TRY?


Did you replace both temp sensors or just one? Did you make sure that the new sensors are the same model? If you did replace both sensors with the correct ones, the main board is bad and will have to be repaired or replaced. The actual manufacturer of your controller can provide limited technical support for someone who has the ability to use a multi-meter and test a few components at the spa over the phone.

Sep 07, 2010 | Dream Maker Spas Dream Maker Ez Spa Hot...

1 Answer

SN ?Non Functional High Temp Sensor? error message


unplug and plug after 20 sec. turn pump fast and wait for 1 min if nothing air is trap anf need to be out

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When Heater is turned on display shows 125, doesn't ignite/fire.


I am not sure if you have solved this issue, or not, but here is one idea. When you turn on the heater, it is reading the temp at 125/126 correct? IF this is what the heater is reading, then the problem is the Thermistor,or temp sensor, and is very easy to replace.

If you have an Owner's Manual, there are part numbers and instructions on how to replace the Thermistor. If you do not have one, follow the link below and it will take you to one online:

http://www.pentairpool.com/pdfs/MaxEThermOM.pdf

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1 Answer

Sta rite 400na gives error code 05 after about 30 seconds


I am not sure if you have received an answer to the issue, or not, but just in case! An EO5 error code is an open stack flue sensor, or switch, There are two forms of the stack flue sensor, so you will need to know which one you have on the heater.

What this error code means is that the sensor "read" the flue temp to be over 500 degrees. Usually, it is just gone bad and reading the wrong temp.

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