How to Tell If Pressure Switch Is Bad on Well System
A faulty pressure switch on your well pump can disrupt water flow and damage your system. Northern Water and Power experts in Post Falls, Idaho, share key signs, tests, and fixes for well owners in Idaho and Washington.
Common Signs of Bad Pressure Switch
Low water pressure below 40 PSI when the pump should activate signals a potential issue. Constant pump cycling, where it turns on and off rapidly, indicates the switch fails to detect pressure changes accurately. Other red flags include no water despite the pump running, continuous pump operation, fluctuating pressure, or unusual noises like humming from the pump.
Step-by-Step Testing Guide
Turn off power at the breaker before inspecting to avoid shocks. Remove the switch cover, check for corrosion, burnt contacts, or leaks, then verify pressure gauge readings—pump should kick in around 40 PSI and cut out at 50-60 PSI. Run water to drop pressure and observe if the switch activates the pump correctly; use a multimeter for continuity on contacts if needed.
When to Call Professionals
DIY cleaning of contacts with sandpaper may help minor corrosion, but replacement is safer for electrical issues or persistent problems. Northern Water and Power offers 24/7 emergency response with 4-hour average fix time for no-water calls, specializing in well pump repairs across Northern Idaho and Eastern Washington. Contact us at +1-208-770-0555 to avoid pump burnout from short cycling.