Question about Rheem 266K to 399K BTU Swimming Pool Natural Gas Heater ()

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I get the error code of SMS, can I still turn the heater on. I have a Rheem pool heater

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Posted on Jan 02, 2017

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SOURCE: Pool heater sparks but does not light up

coud be several things, Do you have Gas and is gas toruned on. Is valve on. The Pilot could be dirty and need cleaned. $350+ sounds reallly pricy for a pilot assembly. Call your Gas Company and get an Estimate and a Qualifed Service tech. You may try turning Off the Power to the Heater Unit and turning it back on , and then trying to turn on heater again, So times after several atemps the valve will lock out and the power needs reset on Propane units.

Posted on Jun 29, 2010

  • 116 Answers

SOURCE: I have a Rheem raypack pool and spa heater. I have

Error Code ROL is "HEAT ROLL-OUT SAFETY SWITCH OPEN". The heater is equipped with a cutoff device to prevent flame roll-out in the event the heat exchanger becomes blocked. This is either a "manual reset", or "Single-use" type fusible link/thermal fuse, that must be replaced or reset after any over temperature conditions have been fixed. Excessive restriction in the heat exchanger flue passage may cause the switch to disable the heater. I don't know your exact model so I'm just generalizing. If you reset or replace the switch, and it trips/burns out again, then you need to address what is causing it. make sure the heater is cleaned out well and no debris is blocking the flue. I fthis doesn't help you can always try calling Raypak Service department at (805) 278-5300.

Posted on Sep 20, 2010

  • 1378 Answers

SOURCE: What is the manufacture year of the rheem

What is the serial number? The 337A series has only been around since the end of 2004 so it will be somewhere in the last 5 or so years.

Posted on Oct 27, 2010

Testimonial: "thanks. I'm selling it and the buyer wanted to know the manufacture year, and I couldn't find it anywhere on the rheem website. I appreciate your help"

  • 366 Answers


sounds like you have a bad thermal governor (regulates water temp inside the heat exchanger) or your pH has been to high and your exchanger is completely scaled up.

Posted on Aug 18, 2011

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Related Questions:

1 Answer

What does ILO mean?

Ignition lock out
This happens when a safety feature kicked in and the heater tried to start up again. Turn the power off at the breaker for 10 seconds and try again.
It should fire up or give an error code for possible issues

Aug 04, 2014 | Raypak Rheem RP2100 399K BTU Natural Gas...

1 Answer

Rheem pool heater code ifault

check gas pressure if ok then turn up by calibration

Jun 30, 2014 | Pool & Spa

1 Answer

What does CFH mean

this is not an error code. it means a call for heat. the pool water temp is colder than your tstat set point

May 25, 2014 | Rheem 266K to 399K BTU Swimming Pool...

1 Answer

Heater shuts down and message says "Fan Lockout".

Shut off the breaker to the heater and turn it back on to reset heater and clear error code.

Oct 16, 2013 | Rheem 266K to 399K BTU Swimming Pool...

1 Answer


high limit bad replace and check gas pressure

Mar 12, 2012 | Rheem 266K to 399K BTU Swimming Pool...

1 Answer

C4 error code on RTG-53DVN

The C4 is a sequence number, there should be a series of numbers that flash after the C4, what is that number?

If you want to see the entire error code list for the Rheem tankless hot water heaters, it can be found at this link:

Aug 19, 2009 | Rheem Tankless Water Heater Manifold...

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