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Spare parts for gas and oil burners and boilers: gas valves, nozzles, ignition electrodes and transformers, pressure switches, flame detectors, fuel pumps, servomotors and burner control boxes.

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Over 100,000 part numbers from every major manufacturer, brought into one structure so that parts from different brands can be compared and replaced.

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Yes. The order number, the manufacturer model and any supplier code all lead to the same part, so a number from an old invoice or a nameplate is enough.

What if the part is discontinued?

The catalogue records what the manufacturer replaced it with, and which parts from other brands do the same job — together with the conditions that apply.

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The catalogue is being assembled now. The shop opens as soon as it is ready.

Honeywell PCB (control board) SM11444U

SKU SM11444U Brand Honeywell

Photos

Key specifications

Flame detection method	ionisation electrode
Application type	central control unit
Modulation actuator drive	fan speed and valve control
Air pressure switch sensing	air pressure switch
NTC sensor input	temperature sensors
Function	conventional burner control (flame safeguard)

all specifications (6) ↓

132.20 EUR

120.18EUR

in stock · 2

incl. 21% VAT · 99.32 EUR excl. VAT · shipping calculated at checkout

Worldwide shipping from stock
Original manufacturer part
Dispatch within 24 h for stocked items

Description

This control board (SKU SM11444U) is a central control unit for wall-hung gas boilers. It performs conventional burner control (flame safeguard), detecting flame via an ionisation electrode. It reads an air pressure switch and accepts NTC temperature sensors, and it controls modulation through fan speed and valve control. It is designed for use in Baxi Main 24 Fi, Baxi Main 24i, Baxi Quasar Plus 24 Fi, and Baxi Quasar Plus 24i.

Further details

Application	modern wall-hung boilers and similar heating appliances
Application type	electronic control board for wall-hung boilers and heating appliances
Control Functions	orchestration of the ignition and safety sequence
Flame Failure Behavior	board locks out and signals a fault
Mounting pattern	base or plug mounting pattern variants

Choosing and fitting

Control boards of this type are selected by matching the exact series and type designation of the original, along with supply voltage, safety and pre-purge times, and flame detection method. The physical mounting pattern (base or plug) also varies. Before ordering, verify that the manufacturer code and catalogue number on the existing board match exactly. Boards from different series within the same brand are normally not interchangeable if these parameters differ.

Signs of failure

During operation, the board initiates the fan for pre-purge, reads the air pressure switch, and checks flame via the ionisation electrode. If flame is not proven within the programmed safety time, the board locks out and signals a fault.

Fits equipment

Baxi MAIN 24 Fi, 24i. QUASAR PLUS 24 Fi, 24 iBaxi Main 24 FiBaxi Main 24 IBaxi Quasar Plus 24 FiBaxi Quasar Plus 24 IBaxi main 24 fiBaxi main 24iBaxi quasar plus 24 fiBaxi quasar plus 24 i

All specifications

Flame detection method	ionisation electrode
Application type	central control unit
Modulation actuator drive	fan speed and valve control
Air pressure switch sensing	air pressure switch
NTC sensor input	temperature sensors
Function	conventional burner control (flame safeguard)

Part numbers

SKU	SM11444U
Additional article	534.568.702