I have a 10 year old Jandy Lite 2 LG millivolt heater. Pilot lights fine. The main burners have been failing to turn on intermittently when I push the ON switch. I followed all the troubleshooting steps and the only odd thing is all the voltages are low. Where it asks "Is voltage 200mv+?", its about 150 mV and where it asks "Is voltage 500mV+" it's about 350-400mV. As the replacement gas valve is $400+ and the replacement temperature control is $200+, I don't particularly want to throw parts at it, especially as I'm not convince either is the problem. What generates the voltage in these heaters? Maybe that's the faulty component?