Balboa M7 Heater Sensor Probe Repair Hot Tub Spa Tube Most Common

Codes for sensors: 30344 Says "sensor assy 12" (1/4) m7 on the sensor label Sold separately - It is always advised to purchase these sensors as a matching pair. Hot Tub and Spa Sensor. This is a Balboa hot tub sensor fits any M7 system. Comes with 06.cm o'ring, metal washer, Notes Install using a little Vaseline on sensor to slide into position Try not to over tighten nut (should be finger tight) and do not switch on hot tub if water has got onto the PCB (wait for this to dry properly before switching on the hot tub). Balboa hot tub sensors are used to repair SNS, SNA or B errors, if the problem persists you will probably need a new PCB.