h400

Our pool was installed around 2007 and still has the original Hayward H400 heater. We had the original Jandy board recently replaced with the Zodiac iAqualink. The iAqualink system is great, and the heater does a good job at heating water, but the issue is the communication and/or relay between...

Have a propane Pentair Max e therm 400 and it’s giving me issues now. The heater will turn on and heat up for about 1 minute or 2 and then will shut down and the fenwal will flash once showing a air fault. I’ve replaced the water pressure switch, thermo regulator, hi limit, and thermistor. The...

Hello, Ive read every post on this site and more trying to get my heater working and hopefully someone has the answer here.... so here is the events 1. heater worked flawlessly for years 2. heater stops working , continually blows f2 fuse on power board once blower motor fires up 3. replace...