Baxi
The Baxi Platinum 24 Combi ErP is a 24 kW natural gas combi boiler with an ErP A-rating for heating and hot water, delivering 11.43 litres per minute of domestic hot water.
The Baxi Platinum 24 Combi ErP is a natural gas condensing combi boiler designed for domestic heating and hot water provision in UK properties. This appliance is a wall-hung unit, offering a compact solution for installations where space is a consideration. It is primarily specified by and serviced by UK gas and heating engineers, who require precise technical data, fault code diagnostics, and installation parameters. This page provides a comprehensive reference for the Platinum 24 Combi ErP model, detailing its operational characteristics and maintenance requirements.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
Heating Flow (22mm), Domestic Hot Water Outlet (15mm), Gas Inlet (22mm), Cold Water Inlet (15mm), Heating Return (22mm), Pressure Relief Valve (15mm)
All systems must be thoroughly flushed and treated with inhibitor (see section 6.2). Only water that has NOT been artificially softened must used when filling or re-pressurising the primary system.
For full terms and conditions, visit www.baxi.co.uk/terms. Failure to adhere to terms and conditions will void your manufacturer's warranty.
The Baxi Platinum 24 Combi ErP delivers a central heating output ranging from 7.4 kW to 21 kW, with a domestic hot water output of 24 kW. It achieves a seasonal efficiency of 92% and holds an ErP A-rating for both heating and hot water, with an XL domestic hot water profile. The boiler provides a DHW flow rate of 11.43 litres per minute at a 30°C temperature rise, suitable for typical household demands. Physical dimensions are 780mm high, 450mm wide, and 345mm deep, with a dry weight of 40.2 kg, facilitating installation in standard kitchen cupboard spaces. The unit operates with a sound power level of 50 dB Lwa, ensuring quiet operation. Key connections include 22mm for heating flow and return, 22mm for gas, and 15mm for cold mains and DHW outlet. The appliance is equipped with a built-in timer and compatible with RF room thermostats, offering flexible control options for homeowners.
Every fault code listed in the manufacturer brochure, with likely causes and engineer actions. Each code has a permalink — paste a URL like https://www.boilertag.com/boilers/baxi/baxi-platinum-40-combi-erp#fault-e20 to jump straight to the entry.
| Code | Meaning | Details |
|---|---|---|
| E20 | Central Heating NTC Fault Show causes & actionsIndicates faulty components. Likely causes
Engineer action Check/replace Central Heating NTC sensor. | Details |
| E28 | Flue NTC Fault, Air Pressure Switch Fault, Blocked Flue, Blocked Condensate or Wiring Fault Show causes & actionsIncludes possible faulty components or blockage. Likely causes
Engineer action Check Flue NTC sensor, Air Pressure Switch, flue system, condensate drain, and wiring. Test Air Pressure Switch by applying light suction to P2 spigot; E28 should display and disappear on release. | Details |
| E50 | Hot Water NTC Fault Show causes & actionsIndicates faulty components. Likely causes
Engineer action Check/replace Hot Water NTC sensor. | Details |
| E110Lockout | Safety Thermostat Operated Show causes & actionsShows overheat of the primary water. Likely causes
Engineer action Check primary water temperature, safety thermostat, and circulation. Reset procedure Turn the selector switch to the 'Reset' position for a minimum of 5 seconds to relight the boiler. | Details |
| E119 | Water Pressure Switch Not Operated Show causes & actionsDisplayed when the primary water pressure is less than 0.5 bar. Likely causes
Engineer action Check system pressure and repressurise if necessary. Check/replace water pressure switch. | Details |
| E125 | Circulation Fault (Primary Circuit) Show causes & actionsDisplayed if: i) within 15 seconds of the burner lighting the boiler temperature has not changed by 1°; ii) within 10 minutes of the burner lighting the boiler temperature twice exceeds the selected temperature by 30°. In these instances poor primary circulation is indicated. Likely causes
Engineer action Check primary circuit circulation, pump operation, and for blockages. | Details |
| E130Lockout | Flue NTC Operated Show causes & actionsOverheat of the flue system. Likely causes
Engineer action Check flue system temperature, flue NTC sensor, and for blockages. Reset procedure Turn the selector switch to the 'Reset' position for a minimum of 5 seconds to relight the boiler. | Details |
| E133Lockout | Interruption Of Gas Supply or Flame Failure Show causes & actionsIndicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected. Likely causes
Engineer action Check gas supply, gas valve, ignition system (electrode, spark generator), and flame sensing electrode. Reset procedure Turn the selector switch to the 'Reset' position for a minimum of 5 seconds to relight the boiler. | Details |
| E160 | Fan or Fan Wiring Fault Show causes & actionsLikely causes
Engineer action Check fan operation and wiring. | Details |
| E193 | Pre-Circulation Fault Show causes & actionsLikely causes
Engineer action Check pump and system circulation. | Details |
Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.
Engineer: Check primary water temperature, safety thermostat, and circulation.
Triggered by fault code E110.
Engineer: Check flue system temperature, flue NTC sensor, and for blockages.
Triggered by fault code E130.
Engineer: Check gas supply, gas valve, ignition system (electrode, spark generator), and flame sensing electrode.
Triggered by fault code E133.
Engineer: Check/replace Central Heating NTC sensor.
Triggered by fault code E20.
Engineer: Check Flue NTC sensor, Air Pressure Switch, flue system, condensate drain, and wiring. Test Air Pressure Switch by applying light suction to P2 spigot; E28 should display and disappear on release.
Triggered by fault code E28.
Diagnostic checklists from engineer-submitted Baxi faults, with step-by-step checks and safety notes.
The Baxi 800 boiler intermittently heating without a fault code can be attributed to several common issues, including low system pressure,…
The Baxi 100HE displaying an 'Ignition Lockout' fault, with no heating or hot water and no noises, indicates the boiler has failed to…
The Baxi 824 Combi 2 displaying fault code E.04.10 indicates that the burner has failed to ignite after four attempts.
Common questions from engineers and homeowners about the Baxi Platinum 40 Combi ErP.
Parts referenced in the manufacturer brochure for routine service and repair.
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Specifications on this page are extracted from the manufacturer brochure. Always cross-check against the latest datasheet before commissioning or quoting. Last updated 28 June 2026.