Why does my LXI heater say high limit?
This week when trying our Lxi heater out (it is about a year old) I got a fault message of “High Limit” and the burners did not fire. I have done some research and believe I know where the limit switch is located, how to test it, and how to replace.
What to do if your heater is on high limit?
The plan right now is to just replace the 2 high limit switches and see if it fires up. Welcome to TFP! I would try putting a jumper across the questionable switches (one at a time) and see if the heater turns on. The high limit would be the right most limit.
Why did I get a high limit 2 fault?
It was not a particularly hot day and water flow was about as strong as it gets (no blockages and freshly cleaned filter). After the first fault, I left the heater off for about 30 min with the pump running, then turned it back on. It fired up fine, ran for a few hours and then I got another high limit 2 fault.
What does high limit mean on Jandy pool heater?
The high limit would be the right most limit. I am getting the high limit error on my Jandy LXi heater. I bought the replacement harness with switches for the Jandy Lxi. My thought was to shut off power to my heater and pump filter and then replace the harness.
This week when trying our Lxi heater out (it is about a year old) I got a fault message of “High Limit” and the burners did not fire. I have done some research and believe I know where the limit switch is located, how to test it, and how to replace.
When does an open high limit error on a furnace occur?
A fault will appear when it’s open or if it doesn’t reset within a specified period of time during which the blower is expected to circulate enough air to cool the heat exchanger to below the set point. After that period the control will lock out and possibly try for ignition again later if the limit resets in the meantime.
It was not a particularly hot day and water flow was about as strong as it gets (no blockages and freshly cleaned filter). After the first fault, I left the heater off for about 30 min with the pump running, then turned it back on. It fired up fine, ran for a few hours and then I got another high limit 2 fault.
The plan right now is to just replace the 2 high limit switches and see if it fires up. Welcome to TFP! I would try putting a jumper across the questionable switches (one at a time) and see if the heater turns on. The high limit would be the right most limit.
What happens when there is low flow in a pool heater?
Heaters have high limit switches for temperature, pressure, and refrigerant (if a heat pump) that will open and shut off the heater in a low-flow scenario. In a heat pump, when the flow is low, the system will run high head pressure. In a gas heater, the exchanger can begin to cavitate and make a loud banging noise.
Where does the water go in a pool heater?
Usually, there is a water bypass valve right at the heater’s intake that would allow water flow to go around the heater (if not in use) instead of through it. Next, the water passes through the heater’s heat exchanger and out. Water then flows through a backflow safety before entering the high chemical chlorinator.
The high limit would be the right most limit. I am getting the high limit error on my Jandy LXi heater. I bought the replacement harness with switches for the Jandy Lxi. My thought was to shut off power to my heater and pump filter and then replace the harness.
How can I troubleshoot my pool heater problem?
Troubleshooting pool heaters is a methodical process; or a process of elimination really. First eliminate water flow issues, then gas flow issues, and finally the low voltage electric currents that run between pool heater components.
Why does my pool heater say low water flow?
Manufacturers equip swimming pool heaters with pressure sensors. These special sensors monitor and detect changes in water flow. For example, in some cases, you will see a “Low Water Flow” warning pop up on your heater’s LCD screen.
