Purge from solar shuts down gas heater

[mas985]

If you have a three way valve controlling the solar, can you adjust the stop to allow some of the water to bypass the solar and keep a small amount of water flowing through the heater. This will also reduce the pressure in the panels and head loss in the system both of which are good things.

[tphaggerty]

Or, if you have a solar controller, put it in "test" or "on" mode. Then it won't turn on and off based on the sensor, it will just stay on. Then, when the sun is off the panels, turn it back to "auto". Just don't forget to turn it back or you'll cool the pool at night!