Gas Pool Heater Troubleshooting

[ellry99]

Is this a millivolt (standing-pilot) or electronic-ignition heater? Did you light it or is it automatic when the heater calls for heat? This is the first information needed to help you with your problem. They each use entirely different systems and the troubleshooting is different. A brand and size would also be helpful.

Thanks for your response. My gas pool heater was installed in 1990. It is a Tropic Isle, millivolt heater. 400,000 BTU.