I have a Hayward H400 pool heater. I don’t heat my pool so I never use it but I do turn it on once or twice a year for about five minutes to make sure it’s working, which right now it fires up just fine. The problem I am having is once the pump turns off, the blower on the heater turns on & stays on. I can’t get it to turn off unless I cut the power. This is obviously a problem because I can’t have the pump on a timer because as soon as the pump turns off, the blower on the heater will run for 16 hours until the pump kicks back on. I’ve done a lot of research & can’t find a solution or anyone who has experienced this problem. Any advice would be appreciated
Find the wiring diagram in the unit or on line. look to see how the fan motor is controlled. Check those controllers to make sure they are working properly.
Call a qualified electrician. More information would be needed to accurately trouble shoot your issue. Do you have automation connected to your heater? Is the heater trying to fire when the pump is off or is it ONLY the fan? Try disconnecting your Water Pressure switch on the heater and see if the issue stops. With WP switch disconnected the heater should not work and the fan should stay off. Replace WP switch and see what happens. Call a QUALIFIED electrician.
Answers & Comments
Find the wiring diagram in the unit or on line. look to see how the fan motor is controlled. Check those controllers to make sure they are working properly.
Call a qualified electrician. More information would be needed to accurately trouble shoot your issue. Do you have automation connected to your heater? Is the heater trying to fire when the pump is off or is it ONLY the fan?
Try disconnecting your Water Pressure switch on the heater and see if the issue stops. With WP switch disconnected the heater should not work and the fan should stay off. Replace WP switch and see what happens.
Call a QUALIFIED electrician.