Question about Rheem M206A 206K BTU Pool and Spa Propane Gas Heater

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How do I spark my heater to get it started?

Starting my heater for the first time this year. has been inspected. showing SPK which I believe is to spark it but not sure how. Please advise?

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Why do I get CFH but then no SPK?


CFH = Call For Heat
SPK = Ignitor is Sparking - attempting to ignite raw fuel

In a lot of cases, Pressure Switch opens up, CFH , is cancelled and therefor no ignition sequence.
try cleaning filter really good. If cartridge, may be time for an overnight soak.

May 21, 2015 | Raypak RP2100 DIGITAL POOL HEATER R265

1 Answer

Heater is cycling on and off, less then one minute cycle time between cycles. Sometimes SPK code comes on and stays on without firing. Have shorted water press switch with no effect. Pretty sure gas...


The SPK Code, indicates that there is power to Igniter and should be producing a Spark to ignite fuel! If this is actually the case, then it is NOT a safety sensor issue, The igniter serves a dual purpose: produce a spark, and then CONFIRM a flame is consuming the fuel. If it does not get a proper Milivolt reading, then gas valve will shut off, hence a cycle occurs. Not enough reading is the same to the heater as no reading! Safety issue. If gas valve stays open, and no flame to consume raw fuel, it will build up and accumulate then when ignition takes place, it go...BOOM! Not Good.
Either insufficient fuel supply/pressure or faulty igniter. It's also not a Gas Valve. It's a simple switching valve, either open or closed.

Mar 16, 2015 | Raypak Digital Low-NOx R.337A Heater...

1 Answer

Why does pool heater read SPK and won't light?


Sounds like your ignitor is shot. You may have to replace it.

Jul 24, 2014 | Rheem Water Heaters

1 Answer

When we tried to light the heater the CFH shows, then I get a SPK which stays on for aroound 1 minute, then I get a LO. The heater never lites.


The CFH is a Call For Heat.
The SPK tells you that it is creating a spark for ignition.
The LO tells me that you are on propane.
The fact that it doesnt light tells me that either the ignitor is not sparking, or that there is no gas, or an incorrect gas supply.
If this unit is installed with flexible gas line, replace this with rigid black pipe or a larger flex line.

Oct 11, 2010 | Raypak Rp2100 Pool & Spa Heater Lonox 407k...

1 Answer

I have a five year old Raypak 207A on my 500 gal spa. When I turn the unit on, the display shows: PV 1, then CFH, then SPK, then the burner ignites, then CFH again, then it displays the flame icon and...


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.

Sep 28, 2010 | Raypak Free Hydraulic Lift Gate Delivery -...

1 Answer

Raypack pool/spa heater works intermittently


You can try pulling your pilot assembly out and clean it. Sometimes it will get sooted up and cause the sensor to short so the heater get's a falce reading and shuts the heater down. Then sometimes the heater will start and sometimes it won't. If this dosen't help check the ignition wire for any cracks or anyplace it may be shorting. Good luck.

Feb 17, 2010 | Raypak Versa 130,000 Btu Above Ground...

1 Answer

I have a raypack 2100. I just tried to start it and it starts to spark and then stops. The display shows SPK


For some reason your not getting gas to your pilot or your spark is grounding somewhere. If you don't see anything obvious it may be time for the repairman.

Sep 27, 2009 | Raypak Free Hydraulic Lift Gate Delivery -...

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