Hayward Heater problem

[bigred]

I have an above ground pool with a hayward H100IDI heater. It fires up and lights then 8 sec later it goes off and does this continuously. I pulled the burners out and cleaned them, cleaned igniter, vacuumed off top of fins in exchanger, played with pressure switch, jumpered a few things and nothing. Still does it. Has anyone else had this type of issue and what did you do to fix it?

[PoolDoc]

I couldn't find any info on that model -- and I threw away my old catalogs.

Ben

[mas985]

Did you also clean the screen on the gas line input? Might also be the thermal limiter switch.

[bigred]

I have tryed everything i can think of! H100IDI heater will not stay lit. I completely dismantled and cleaned and it wasn't that bad. It will fire up and run for about 8 sec then go off. I have jumpered every switch on this thing to find the culprit and none of the switches appear to be bad. I am wondering if the gas pressure is too low maybe? Does anyone have any ideas to try before i call in a service call? We need this heater bad before memorial day weekend!

[bigred]

sorry for the dual post i didn't think my original went through yesterday. yes i cleaned the screen. I looked at that switch and removed it from teh blower housing to see if it was overheating and it still shuts off. any other ideas?

[Watermom]

I'm going to merge your two threads. Best not to double post as it makes it more confusing to be able to help.

[bigred]

Thank You. I am starting to sweat about this heater not working.