I have a Hayward H400FDN and the initial problem was the 3A fuse blowing after a few seconds every time the heater started. Did the troubleshooting and replaced the control board (don't you just love that they used garbage plastic for the standoffs, wire harnesses, and MOLEX connectors?). Fuse no longer blows, but....
When I ask for heat I hear a few relay clicks and get the AO message. Blower motor windings have 4.5 ohms resistance, board is putting out ~120VAC of power. Troubleshooting...
Odd blower issue with Hayward H400FDN blower or???
When I ask for heat I hear a few relay clicks and get the AO message. Blower motor windings have 4.5 ohms resistance, board is putting out ~120VAC of power. Troubleshooting...
Odd blower issue with Hayward H400FDN blower or???
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