Heat not firing, read-out indicates "FLO"
My Raypak 2100 heater will not fire up, and reads "Flo" on the read-out. But the pressure reading on my filter system is very low, indicated more than adequate flow through the system.
Pool & Spa - Raypak - Rp2100 Pool & Spa Heater Lonox 407k Btu Natural Gas Polymer...
Answers & Comments
You may have a bad pressure switch.if you are getting flow thru the heater and this code is comeing on there are only two reasons.No flow or bad switch.
I have the raypak heat pump and it states flo when there is not enough water pressure try backwashing and make sure all your vales are open.