Spa Pressure Switch Adjustment

Zone 1 is where the switch is always in contact with the diaphragm and therefore always closed.

Spa pressure switch adjustment.

If a clean filter does not remove the flow error message let s see if adjusting the pressure switch helps. It s sole purpose is to shut off the heater if low pressure low water flow occurs. Changing out a hot tub pressure switch because of a flo issue. Zone 4 is the sweet spot in the adjustment range that closes the switch.

Hot tub pressure switch adjustments the pressure switch on a hot tub or spa is a pressure sensor that is mounted onto the heater housing or very close to the exit point of the heater. You may have to adjust any pressure switch to match your spa especially 1 pump spas. If you must adjust then here is how to adjust a tecmarc or balboa pressure switch. Sometimes adjusting recalibrating the pressure switch is enough to get the spa working again.

Factory presets can be found inside the cover of the pressure switch as shown on right above. Remove the cover on your pressure switch. The purpose of your pressure switch is to measure pressure in the line when your pump is running. Use it as a template to adjust your pressure switch if needed.

Check your water level filter s and make sure your pump is working correctly before attempting to adjust your pressure switch. Some switches have an adjustment screw instead of the thumbwheel. In zone 3 the switch is in an unstable condition where the turbulence of the water surrounding the diaphragm causes the switch to randomly open and close. Changing out a hot tub pressure switch because of a flo issue.

This switch has a diaphragm side of it which is going to go up close the contact between these two points. Above shows most pressure switch designs. Zone 2 is the other extreme when the switch is never in contact with the diaphragm and is always open. If the spa s pump comes on and either an fl or flashing heater light comes on that means the spa has turned the pump on and doesn t see water flow and will not turn on the heater.

Pressure switch adjustment a little thumbwheel is located at the bottom of the switch to manually adjust the sensitivity of the switch. How to adjust a pressure switch. Most pressure switches can be adjusted easily by turning a dial. Adjusting a switch most pressure switches can be adjusted by turning a dial or rotating a nut but this is not advised due to masking other errors in a hot tub.

There are 4 zones in the adjustment range of the pressure switch.