Rheem P-M407A-EN-C Pool/Spa heater does not start. I get the CFH then SPK but the unit just stays in SPK mode and will not turn on. I can hear the sparking cycles. The unit is about a year old and woked great last season. This is the first time I tried it this year.

SOURCE: Rheem model p-m266a-en-c digital gas pool heater runs, shuts down

CFH is call for heat not sure what spk is, but will find out and let you know.

SOURCE: Rheem model p-m266a-en-c digital gas pool heater runs, shuts down

So now we know what it stands for. Now how do we call for heat? Can we do this ourselves?

SOURCE: I just purchased a home

They have good listings on their web site.
http://www.rheem.com/product.aspx?id=8B064EC5-B708-4821-9F2B-DEF3A2243F90
That link should be to your model. When you click on the link for your manual (installation instructions)l, if it doesn't download. Right click on the link, and select download
So what is the problem?

Tom Carson

• 3083 Answers
• Posted on Sep 05, 2010

SOURCE: I have a Raypack pool

Have you tried using a fine emory cloth to clean the ignition wire terminal? Sometimes oxidation builds up on them, and they play heck making contact. CFH is call for heat, and SPK is spark. Clean or replace the ignition wire good and see what happens. The clicking sound is probably the electronic ignition trying to spark.
Looked on the net, but couldn't find these codes, and noone reported any problems. It could be a temperature sensor- that is the cheapest thing to try first. If that doesn't fix it, it could be a faulty ignition unit.
Here is a good web blog of these systems, and may assist you:
http://blog.poolcenter.com/article.asp?articleid=6050
Good luck, thanks for using FixYa, and hope this helps.
Good luck, hope this helps, and thanks for using FixYa.

SOURCE: Hi, The pilot won't light

I am thinking it could be the relay. The relay directs the power to the device. In most devices it is the one that makes the 'clicking' sound.