Spa Pressure Switch Adjustment

It s sole purpose is to shut off the heater if low pressure low water flow occurs.

Spa pressure switch adjustment.

The purpose of your pressure switch is to measure pressure in the line when your pump is running. So your pump comes on low speed. If you must adjust then here is how to adjust a tecmarc or balboa pressure switch. Zone 2 is the other extreme when the switch is never in contact with the diaphragm and is always open.

Zone 4 is the sweet spot in the adjustment range that closes the switch. Sometimes adjusting recalibrating the pressure switch is enough to get the spa working again. There are 4 zones in the adjustment range of the pressure switch. 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.

Pressure switch adjustment a little thumbwheel is located at the bottom of the switch to manually adjust the sensitivity of the switch. Check your water level filter s and make sure your pump is working correctly before attempting to adjust your pressure switch. 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. 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. To increase or lower both cut on and cut off pressure you will turn the nut on top of the large center spring as seen in the picture below. Use it as a template to adjust your pressure switch if needed. If a clean filter does not remove the flow error message let s see if adjusting the pressure switch helps.

How to adjust a pressure switch. How can you tell which way to adjust. Most pressure switches can be adjusted easily by turning a dial. Above shows most pressure switch designs.

Changing out a hot tub pressure switch because of a flo issue. Some switches have an adjustment screw instead of the thumbwheel. 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. Factory presets can be found inside the cover of the pressure switch as shown on right above.

You may have to adjust any pressure switch to match your spa especially 1 pump spas.