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Raypak RP2100 Model P0127NCO spa heater with a problem.

I have a Raypak RP2100 Model P0127NCO spa heater with a problem. In the last few days the burner has started to cut out and then re-ignite. I have the thermostat set to 37 and when i switch the heater on the burner lights up fine but when it reaches around 30 the burner cuts out and then a few seconds later re-ignites? It then continues to do this. If i then switch the unit off and turn back on the burner re-ignites. Any ideas would be greatly appreciated..........

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  • Raypak Master
  • 1,631 Answers

Cycling on/off like that can be a number of things. One of the more common problems is a "flow" problem. Try cleaning out your filter. If it is this type of problem, the flow switch is not sensing proper amount of water flow.

Posted on Jan 15, 2013

  • Tony Jan 16, 2013

    Thanks for the information. I believe low pressure was the problem as I released the bleed valve on the filter several times and air came out. I think I turned the heater on too quickly after having cleaned the filter and must have had air in the pipes. Seems to be fine now. Much appreciated. Tony

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 990 Answers

SOURCE: Startup cycle goes fine. All lights(power,

If you are getting fire and have an eo5 this is a reading for no flame so it is not reading the flame. What you probally have is small spider webs in your burner orfaces. You will need to pull the burners out and with a small wire or the like clear the gas orfaces going to the burners. These little webs can divert the gas to the main burners and keep it from the burner that reads the flame. Your heater will come on with a big woosh as the gas needs to come from other burners to fire. I hope this helps. Good luck

Posted on Nov 28, 2009

  • 139 Answers

SOURCE: Service light comes on our Raypak RP 2100 pool heater.

this usually indicates a high limit condition.you must first ascertain if you have a component failure or a true high tempature condition.your model has 2 limit controls and they are both located in side panel on water in/out header

Posted on Sep 19, 2009

  • 10865 Answers

SOURCE: Propane patio heater ignition problem

I would change the thermocouple and here is why:

The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
How the Thermocouple Works
So what is this thing and how does it work? Well the thermocouple (technically called a thermocouple junction) is a device that contains two metal wires welded at the ends and placed inside a protective metal case. The thermocouple sensor is found at the business end of the pilot flame and is designed to be placed in the hottest part of the flame. The other end is connected to the pilot valve body. As the thermocouple heats up, it produces a small amount of electricity and when it gets hot enough from the pilot, send a signal to open the gas valve by using a solenoid operated by a 24 volt transformer. The thermocouple calls the shots, and by converting heat to an electrical signal, it allows the gas valve to open or close. Once the gas valve is open, gas is then constantly supplied to the pilot and as required for the gas burners (as called for by the thermostat). If the pilot goes out, then the thermocouple gets cold and produces no electric signal to open the gas valve's solenoid and the gas valve shuts off the gas supply to the pilot and burners

Posted on May 27, 2009

john224
  • 1378 Answers

SOURCE: Hayward Heater Problem ''AO'' error. H400IDH

Thank you for posting your question here on Fixya.com.

It sounds as if the air activated switch the tube you mention attaches to is not working. Pull the two wires from it and connect them to simulate the switch closing. Start up the heater to see if you get ignition. If so, replace the switch.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!

John

Posted on Feb 14, 2010

  • 44 Answers

SOURCE: I have a five year

CFH means "Call For Heat", and SPK is "Spark". It sounds like you are running out of gas.Propane tanks need to have 30% in the tank for a heater to run correctly,and after they are filled you must bleed the air out of the line.If you have Natural gas,the gas line may be too small to supply enough gas to keep it running. NOTE...gas pressure MUST be checked with the heater running.

Posted on Sep 28, 2010

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