Description
Replacement Boiler Timer Modules – Mechanical Boiler Time Controls FM/1 Series
TFC Group has been the leading supplier of mechanical timer modules to the UK boiler industry since the late 1980s, with over 20 million timers supplied to principal manufacturers. These timers remain a vital component in the spares market, with demand in the tens of thousands annually.
TFC’s Optimum range of time controls includes four key variants of the standard 220-240V AC 50Hz mechanical timer module. These robust, synchronous motor-driven timers are designed for precise control and compatibility with various boiler models.

STANDARD
Product Code: OP-FM1STUZH
Compatible with installations featuring standard tab terminal connections, operating on a 220-240V AC 50Hz supply to terminals 1 and 2, with volt-free switching available on terminals 3, 4, and 5.
- Baxi Part Code: 247206
- Compatible Models: Baxi Platinum, Duo-Tec, Gold; Main 24HE, 30HE; Potterton 80E, 105E, Performa 24 & 28
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W18
Product Code: OP-FM1STUZH18
Designed for installations with vertical tab terminal connections, operating on a 220-240V AC 50Hz supply to terminals 1 and 2, and featuring volt-free switching on terminals 3, 4, and 5.
- Compatible with Ideal Combination Boilers:
- UIN204839: Logic and Logic+
- UIN201168: Esprit
- UIN201391: Excel
- UIN208445: IXUS & Vogue
Price: £19.95 Buy on Amazon

W9
Product Code: OP-FM1STUZH09
Designed for installations requiring a right-hand tab terminal connection, operating on a 220-240V AC 50Hz supply to terminals 1 and 2, with volt-free switching on terminals 3, 4, and 5.
- Baxi Part Code: 7658276
- Compatible Models: Baxi 200 & 400 combi boilers
Price: £19.95 Buy on Amazon

W27
Product Code: OP-FM1STUZH27
Suitable for installations requiring a left-hand tab terminal connection, operating on a 220-240V AC 50Hz supply to terminals 1 and 2, with volt-free switching on terminals 3, 4, and 5.
- Alpha Part Code: 6.1000201
Compatible with all Alpha combi boilers - Baxi Part Code: 7212341
Compatible with Baxi Eco Blue combi boilers
Price: £21.49 Buy on Amazon
Key Features:
- 24-Hour Operation: Features a 24-hour dial with 96 x 15-minute tappets for flexible scheduling.
- Manual Override: Fix ON, Auto, or Fix OFF modes for convenient control.
- High Durability: Nominally rated 16A volt-free changeover contacts.
- Custom Compatibility: Options available with or without clock hands and terminal configurations to match specific boiler models.
Specifications:
- Voltage: 220-240V AC, 50Hz.
- Contacts: 16A volt-free changeover.
- Control Options: Manual override (Fix ON / Auto / Fix OFF).
- Dial Configuration: 24-hour dial with 96 tappets for 15-minute intervals.
The Replacement Boiler Timer Modules in the FM/1 series are reliable, durable, and tailored to meet the demands of both boiler manufacturers and the spares market, ensuring precise and seamless time control in heating systems.