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Honeywell ST9400C Programmer (88608)

Separate timing. 2-wire installation. Override facility. Holiday mode. Automatic BST/GMT time change. Boost function. Building Regulations compliant, WEEE, RoHS.

  • 7 Day Programmable
  • 1, 2, or 3 On/Off Periods per Day
  • Digital Display
  • Suitable for Gravity-Fed & Fully Pumped Systems
  • 3 Pre-Set Programmes
  • 2 Wire Installation
  • Backlit Display
  • Battery Back-Up
  • Automatic BST/GMT Time Change
  • 1 Year Guarantee

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£79.99INC VAT

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Honeywell ST9400C Programmer is rated 3.4 out of 5 by 45.
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Rated 5 out of 5 by from Just the job I purchased this programmer for a customer who had the previous ST6400C programmer as an integral part of their Stanley Cooker/boiler. It was a bit more expensive than going elsewhere but it's Christmas, Screwfix had it on the shelf at a branch, so I could get the job done before my customers visitors arrived. They were more than happy to pay the small premium. I have fitted these programmers before so can give it top marks for features, reliability etc.
Date published: 2016-12-31
Rated 5 out of 5 by from Replacement unit Had a problem with my old controller. Either provided hot water or central heating. My heating engineer came out and recommended this unit. Said it would be easy for me to fit. He was right. Two screws to loosen, replace unit onto original backing plate and re-tighten screws. Five minute job. Now have perfect system and increased programming options.
Date published: 2016-12-24
Rated 5 out of 5 by from Complicated but good This programmer is not for the customer who wants a simple on/off clock, it has all the features for a domestic household who need to program their heating daily. Easy to install, wiring easy.
Date published: 2016-12-19
Rated 5 out of 5 by from All good Firstly I've only had this item a couple of days so the reliability score is, ironically, not that reliable but hopefully it will be accurate. It was purchased to replace a second Drayton LP722 programmer which failed within 6 months, the previous one only lasting 2 years. Hopefully this one will have a longer lifespan. Mounting plate compatible with the Drayton so it was an easy remove and replace, no wiring to be done. Honeywell provide a compatability chart on their website too so you can check. The programmer has plenty of functions and features like boost times and holiday modes and it was a doddle to set up. It seems well built and worked straight out of the box.
Date published: 2016-11-01
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I have a a glow-worm mastermind time switch connected to a glow-worm Galaxie boiler.will the Honeywell ST9400C successfully replace my old timer?

Asked by: Henhouse

I have this model with my existing central heating system and find it reliable. Can it be used to run a hotwater tank with two immersion heaters without being attached to a central heating system?

Asked by: Blockage1

hi, will this model bined {connect }with my current relay box bdr91 as i have a cm921 with a faulty display that i want to replace witout doing any wiring

Asked by: maghater
This device is not a wireless device and will not bind to the BDR91 or CM921. You might be lucky and find a second hand CM921 on ebay - I had to replace the relay unit (BRD91) a little while ago and found quite a few on ebay - but bidding can be fierce!
Answered by: MrIce
Date published: 2017-02-05

Wifi

Can it be operated via Wi-Fi
Asked by: Tacobellsb
Hello Tacobellsb, In order for this question to be answered, you would need to call 01344 656 200 and press option 1. Hope this helps.
Answered by: Honeywell
Date published: 2017-01-27

can i change programmer head without rewiring. ie just leave backplate on wall. Is the battery replacable

Asked by: speaky
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Specification
Brand Honeywell
Central Heating Control Type Programmers
Compatible Boiler Type All Boilers
Display Type Digital Display
Installation Type 2-Wire Installation
Manufacturer Guarantee 1 Year Guarantee
Manufacturing Standards Building Regulations Compliant, CE, WEEE, RoHS
Model No ST9400C
Pack Size 1
Pieces in Pack/Case 1
Product Depth 35 mm
Product Height 99 mm
Product Type Programmer
Product Width 145 mm
Programme Facility 7 Day Programmable
Suitable System Suitable for Gravity-Fed & Pumped Systems
Switch Type SPDT
Zoning Level Up to Two

Switching/contact rating: SPDT 3(3)A. H x W x D: 99 x 145 x 35mm. Backplate fit: Industry Standard. Suitable for underfloor heating.

Downloads

Instruction Manual