Back to Error Codes
003HIGH

Low Water Pressure (Weil-McLain)

Weil-McLain boiler system water pressure is too low for safe operation.

What This Error Code Means

The low water cutoff or pressure sensor detected insufficient system water pressure.

Common Causes

  • System water leak
  • Automatic fill valve not working
  • Expansion tank waterlogged
  • Pressure relief valve discharged
  • Recent bleeding of radiators

Affected Brands

Weil-McLain

How ROMA Heating Fixes This

  • Check for visible system leaks
  • Test automatic water fill valve
  • Inspect expansion tank charge
  • Repressurize system to correct pressure
  • Repair any leaks found

24/7 Emergency Service

Available nights, weekends, and holidays. Fast 1-2 hour response.

Licensed Technicians

TSBC Gas License LGA0202903. Fully insured and WCB covered.

Same-Day Service

We diagnose and fix error code issues quickly.

Related Services

Boiler No Heat

Licensed technicians standing by 24/7

Boiler Ignition Failure

Licensed technicians standing by 24/7

Boiler Pressure Loss

Licensed technicians standing by 24/7

Boiler Leak Repair

Licensed technicians standing by 24/7

View All Services →|Browse Replacement Parts →

Seeing Error Code 003?

Call now — our technicians can diagnose and fix it today

Call 778-909-5731