Rheem Error Water Pressure: Water pressure sensor fault
Shown as a blinking (non-F) indication. The control cannot get a valid reading from the water pressure sensor — verified by checking sensor resistance at the control module (Black-Orange and Black-Yellow should read 7.5 to 9.5 Kohm). Often associated with low system water pressure. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
Shown as a blinking (non-F) indication. The control cannot get a valid reading from the water pressure sensor — verified by checking sensor resistance at the control module (Black-Orange and Black-Yellow should read 7.5 to 9.5 Kohm). Often associated with low system water pressure.
Rheem fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Rheem error Water Pressure
- Low system water pressure (gauge below ~12 psi cold)
- Faulty or out-of-spec water pressure sensor
- Loose or damaged pressure-sensor wiring harness
- Air in the system after a refill
What you can safely check
- Check the boiler's pressure gauge reads about 12-15 psi when cold; if low, top up using the fill valve per the owner's manual
- If the gauge is fine but the fault stays, call a technician to check the sensor
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
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Parts often behind Rheem error Water Pressure
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Rheem Error Water Pressure Repair Across Metro Vancouver
Frequently Asked Questions
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