Hello! Quick question about my pool heater. It's a Hayward Heat Pro HP21404T. For some reason we are getting the FLO error when we utilize our deep end circulator and we cant figure out why. The heater seems to be working fine when just the 2 returns are on. Warm water is coming out of them. Skimmers and pump basket are free of debris, no other equipment errors, pump pressure is normal. Anyone come across this problem before? Thanks!
Hayward Heat Pro HP21404T
- Thread starter Kir
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swamprat69
Well-known member
This troubleshooting guide may help. Near the end is a flow chart for a PS/FLO fault. Note that resistance check of pressure switch is done with the pump running and the heater power off. http://haywarddocs.info/wp-content/uploads/2017/10/2012-Heat-Pump-TSG.pdf