LO is a limit string open. This is what I refer to as a saftey circut. It will peobally be a dirty filter or a plugged up basket. The heater need enough water flow to run or it will overheat and cause damage to the heater. Without enough flow the saftey circut shuts the heater down before this can occur. If it is more than this it is probally time to get a repairman involved. Good luck and remember this is a box full of fire that runs on high voltage.
On your Pentair Mini Max heater, LO - simply means... That the temperature sensor of your heater, is reading the temperature of the water going through it, at a temperature of 58° or lower. Because of the condensation problem that will occur when the heater fires at this temperature, the heater has been designed to remain off until the water temperature warms up a little more.
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LO is a limit string open. This is what I refer to as a saftey circut. It will peobally be a dirty filter or a plugged up basket. The heater need enough water flow to run or it will overheat and cause damage to the heater. Without enough flow the saftey circut shuts the heater down before this can occur. If it is more than this it is probally time to get a repairman involved. Good luck and remember this is a box full of fire that runs on high voltage.
On your Pentair Mini Max heater, LO - simply means... That the temperature sensor of your heater, is reading the temperature of the water going through it, at a temperature of 58° or lower. Because of the condensation problem that will occur when the heater fires at this temperature, the heater has been designed to remain off until the water temperature warms up a little more.