Fisher & Paykel Washers 37 Error: Pressure sensor fault
Fisher & Paykel washer error code 37 is a mid-severity fault meaning Pressure sensor fault — water level sensor error. A faulty pressure sensor risks overfilling the drum, which can cause water overflow onto your floor. Power-cycling clears the fault code.
~60%
DIY Fixable
From $90
Typical Repair Cost
45 min–2 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A faulty pressure sensor risks overfilling the drum, which can cause water overflow onto your floor. Do not run wash cycles until the sensor or hose is confirmed functional.
Can I reset the code?
Yes. Power-cycling clears the fault code. However, if the pressure sensor is physically faulty, overfilling is a real risk on the next cycle. Verify the hose and sensor before resuming use.
When to stop immediately?
Stop if you notice: Water level is rising above the normal maximum line visible through the lid, Water is entering the detergent dispenser or overflowing the tub lip.
Symptoms You May Notice
Code 37 during fill or drain
The fault appears while the machine is filling or draining, as the controller receives an out-of-range or static signal from the pressure transducer.
Overfilling of drum
The machine fills past the normal water level because the pressure sensor cannot signal the controller to stop the inlet valve.
False drain faults
Code 35 or 36 may appear alongside code 37 because the controller believes the drum is still full when it is actually empty.
Possible Causes
Blocked pressure sensor hose
The small-bore hose connecting the tub to the pressure transducer is blocked with detergent residue, preventing accurate pressure reading.
DIY PossibleCracked or disconnected pressure hose
The pressure hose has cracked or pulled off the tub spigot or sensor port, causing the transducer to read atmospheric pressure at all times.
DIY PossibleFailed pressure transducer
The pressure sensor has failed and is outputting a signal outside the controller's acceptance range.
DIY PossibleExcessive detergent residue in tub
Heavy foam from excess detergent is generating false pressure readings by partially entering the pressure hose.
DIY PossibleSafe Checks You Can Do
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1
Run a drum-clean cycle
Run a hot cycle with no laundry and no detergent, or use a washing machine cleaner tablet, to flush detergent residue from the tub and pressure hose.
Pressure hose blockage from concentrated detergent residue is common in machines used primarily with liquid detergent. This step costs nothing and often resolves code 37.
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2
Inspect the pressure hose
After unplugging, locate the pressure hose — a small-bore tube running from the lower tub to the pressure sensor on the main PCB area. Check both ends are firmly connected and the hose has no cracks or kinks.
Blow gently through the disconnected hose to confirm it is clear. You should hear air bubbling in the tub.
Tools required -
3
Test the pressure sensor output
With the hose reconnected, plug the machine in and check sensor voltage using the service mode if available (consult your model's service manual). A functional sensor varies voltage smoothly as water level changes.
A static or zero voltage at all water levels confirms sensor failure.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Pressure sensor replacement requires identifying the correct part number for your specific SmartDrive model variant
- Persistent code 37 after hose and sensor replacement may indicate a main PCB input circuit fault
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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