Raypak 2100 gas pool heater pilot wont stay lit

SOURCE: pool heater wont fire up

Its just after 1 am here as well, Ontario Canada. Yes, you have to remove the front lower panel by raising it then pulling out at the bottom. Then compare the valve you have with the 2 in the picture on pg 5. If it is easier, you can have your husband call me while doing this and I can talk him through it. My contact information is located on the main page of my company website www.emshvac.com

Thanks
Richard

SOURCE: I have a Raypak pool heater the pilot will lite but the unit will

My Rapak gas pool heater burner will not ignite. I changed the flame sensor and then the main gas valve (on a recommendation of a heating contracter) and after spending almost $300 on parts, I may have not needed, it still will not ignite. The water temp has been around 80 using the solar cover but now with the air temp in the 50's at night and only in the 70's in the day the water is a brisk 70 degrees. We would like run the heater now, so we can use the pool for a bit longer this fall.
Any ideas? Some people told me there is a valve that senses the proper amount of water is flowing around the boiler so it doesn't burn up, is this possiblely the problem that the valve is not opening?
Joe Snyder, Toledo, Ohio

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

SOURCE: I have a Raypak model 153 pool heater. The heater

For some reason your heater is not recognising the flame when it goes on. The biggest reason for this will be small spider webs in the burner orfaces. These are on the main gas manifold where it connects to the burners. You can get a small wire and bend it to go in these orfaces but the first time you do this it will probally be easer to pull the tray and remove the orfaces from the gas line. Good luck, I hope this helps.

SOURCE: Can't light my Raypak Pool Heater.

Often you can see the pilot if you use a small mirror. With the button on the gas valve pushed down you should get pilot. Once the pilot is lit it warms the TC(thermocouple) creating the static charge to open the gas valve on it's own. The TC is set in the pilot assembly. It will be a small tube like piece with the wires coming from it. Some times you can pull and replace it but I will usually get the whole pilot assembly and just replace that. It will probally be rusted and can be cloging the tiny orface on the pilot itself.
If you have a milivolt meter you can check the TC by pulling the wires that come from it at the gas valve and with the button on the gas valve pushed in and a good flame you should get 500-700 MV from the TC. This is 1/2 a volt+ so you will need a MV meter. But this will tell if your TC is bad or if your valve is bad.
Good luck.