My H series Hayward Heater is 20 years old. Where can I get a service manual for it.

I installed a new cartridge and started the filter to get water back in the system. I turned the heater on, it starts, runs for about 10 seconds, starts making noises and shuts off with a HS message. Anyone know what I’m missing, do I need to prime the heater?

Thanks for the video and helpful advice!

Personally, this really helped me with replacing the flow diverter to my Hayward, so greatly appreciated! However, one slight criticism I do have is that, with you refusing to film in portrait mode, I did find it slightly difficult to watch this on my 40" Class - LED - Roku TV. Otherwise keep up the great work and continue making awesome content!