Baxi Error E118: Low water pressure
Primary system water pressure has dropped too low (typically below about 0.5 bar) for the boiler to fire safely, so it locks out. On the Luna Duo-Tec the same low-pressure condition is logged as code 118 'Hydraulic pressure too low.' We diagnose and repair it across Greater Vancouver — same-day and after-hours.
Primary system water pressure has dropped too low (typically below about 0.5 bar) for the boiler to fire safely, so it locks out. On the Luna Duo-Tec the same low-pressure condition is logged as code 118 'Hydraulic pressure too low.'
Baxi 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 Baxi error E118
- Gradual pressure loss over time requiring a top-up via the filling loop
- A leak somewhere in the radiators, pipework or boiler
- Recently bled radiators dropping system pressure
- Faulty or waterlogged expansion vessel
- Faulty water-pressure sensor or low-water cutoff
What you can safely check
- Read the pressure gauge — if it is below ~1 bar, re-pressurise using the filling loop per the user manual
- Look for obvious damp patches or drips around radiators and pipework
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.
Error E118 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Baxi repair.
Parts Are Professionally Installed — Not Sold for DIY
For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.
Parts often behind Baxi error E118
Genuine Baxi parts we supply and professionally install — never for DIY.
Our Guarantees & Warranties
Every repair and installation is backed by genuine parts, licensed workmanship, and a promise to make it right.
Workmanship Guarantee
Every repair and installation is backed by our written workmanship guarantee. If a part we installed fails because of our work, we make it right.
Genuine OEM Parts
We fit only manufacturer-original (OEM) components so your boiler performs to spec and keeps its factory warranty intact.
Manufacturer Warranty Honoured
As an authorised service provider for the brands we work on, our installs preserve and register your manufacturer parts warranty.
Licensed & Insured
All work is completed by Technical Safety BC–licensed gas fitters (Licence LGA0043870, Boiler Permit LBP0046450). We are fully licensed, bonded and insured for your protection.
Up-Front Pricing
You approve the diagnosis and quote before any work begins. No hidden fees and no surprise charges.
Satisfaction Commitment
Backed by the full HVAC resources of CanroHeat.ca and four decades of service in Greater Vancouver since 1985.
Baxi Error E118 Repair Across Metro Vancouver
Frequently Asked Questions
Fix Baxi Error E118 Today
Licensed Baxi diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
A Division of CanroHeat.ca · Licensed Gas Fitters · Serving Greater Vancouver since 1985