Product Reviews

HoneywellST9400C7dayProgramer

HoneywellST9400C7dayProgramer
Average Customer Rating:
3.172 out of 5
3.2
 out of 
5
Open Ratings Snapshot
Rating Breakdown 29 reviews
5 stars
10
4 stars
5
3 stars
4
2 stars
0
1 star
10
16 of 29(55%)reviewers would recommend this product.
Customer Reviews for Honeywell ST9400C Programmer
Review 1 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Honeywell Programmer
24 Oct 2014
By nsilco
, Lancaster
" I couldn't fault Screwfix's performance in delivering the above -- a first class service, without doubt "
0 of 3 people found this review helpful.
Review 2 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
3 out of 5
3 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
3 out of 5
3 out of 5
CH/HW Controller
14 Sep 2014
By Me01
, Berkshire
" Needed to replace my 25yr old ST7100. Changed back-plate followed wiring instructions, switched back on - worked.
Screwfix not cheapest but available locally. Can't tell about reliability but would like to think this controller will also last 25yrs :)
"
Review 3 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Honeywell ST9400C Programmer
31 Aug 2013
By Rachy
, Gloucester
" Programmer fitted the rather older model space and is doing the job. "
Review 4 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Very good programmer
5 Jan 2013
By HMAH
, Surrey
" The plumber suggested this over the 'cheap' ones. It looks and works great. It has a backlit display - so much better than the last one. "
2 of 2 people found this review helpful.
Review 5 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
The best!
9 Mar 2012
By misterc
, shropshire
" I've installed many of these over the years, and for ease of installation, features and reliability nothing beats it. "
3 of 3 people found this review helpful.
Review 6 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Excellent performer
25 Mar 2010
By slycy
, Portsmouth
" I reqired a controller for our local church which was versatile, easy to use and install. It replaced two timers controlling two zones and needed to be easily operated. A seven day programme was a must since Sunday is the main day.
Fitting was straight forward and the large display is excellent.
The override feature is very handy.
"
2 of 2 people found this review helpful.
Review 7 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Looks good, easy to install
15 Jan 2010
By Tuna
, Cambridge
" A good looking, well thought out little timer. Easy to install and easy to operate. Display is excellent and price is good. "
2 of 2 people found this review helpful.
Review 8 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Honeywell ST9400C Programmer
16 Dec 2009
By awosborne
, Reading
" a quality Replacement for my old, and faulty, timer/pgrammer.
clearly well buit, with sturdy casing and a good display window for easy reading in a poorly lit (under shelf) location.
A well written installation note ensured no problems with replacing an older Honeywell model.
but, as always, ensure the backplate is cleaned of debris My only problem was in the poor connectivity with the contact pins as previous debris prevented a flush fit - presenting as poor power connection and a therefore a 'dead' display.
Once the backplate was cleaned, and the new unit re-presented, this problem was never seen again "
4 of 4 people found this review helpful.
Review 9 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Ideal Replacement
8 Dec 2009
By AdamR
, Leicester
" Used this as a direct replacement for my faulty ST6400C. First impressions being this is a far superior product. Easy replacement, used existing backplate .... job complete in under 60 seconds ! "
6 of 6 people found this review helpful.
Review 10 for Honeywell ST9400C Programmer
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Excellent and easy to use
4 Feb 2009
By Penny
, South Devon
" Purchased this programmer to replace existing older version. Easy to install. You simply take off the front of the old one and place the new one on the back plate left on wall. An improvement on the old including a better, lit display. I would recommend this product. "
7 of 7 people found this review helpful.
Review 11 for Honeywell ST9400C Programmer
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
5 out of 5
5 out of 5
easy programmer
3 May 2015
By pagey0710
, Essex
" This product was very easy to install, with a very simple programming set up. "
Review 12 for Honeywell ST9400C Programmer
Overall Rating: 
4 out of 5
4 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Pleased with this so far
1 Aug 2013
By BarneyR
, Newcastle under Lyme
" Only used this Programmer now for approx. one month but very pleased with it to-date. Still to use holiday programme. Great that it just fitted into existing backplate from previous Honeywell Programmer. "
Review 13 for Honeywell ST9400C Programmer
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Central heating system program
30 Dec 2012
By aldrake
, Essex
" The product was as expected from an organisation with a good name like Honeywell, it was easy to install and the directions for use relatively simple to follow. "
Review 14 for Honeywell ST9400C Programmer
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
easy to fit replacement
6 Dec 2012
By redal
, Kings Lynn
" I needed to replace a faulty type 721 programmer and this unit was a straight replacement.Just removed the old unit and plugged in this one no messing, even the date and time were correct, brilliant. "
Review 15 for Honeywell ST9400C Programmer
Overall Rating: 
4 out of 5
4 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
3 out of 5
3 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
3 out of 5
3 out of 5
Excellent - but will it last
25 Jul 2012
By currantbun
, carlisle
" I used this to replace an existing one that had only lasted a couple of years. After fitting (which was very easy due to the universal backplate) i spoke to a neighbour who told me about half the estate had had these programmers replaced. Maybe in hindsight i wouldn't have fitted it, however i can't fault it while it does work. Very good, easy to understand but fully featured. Excellent price as well. "
Review 16 for Honeywell ST9400C Programmer
Overall Rating: 
3 out of 5
3 out of 5
Value: 
2 out of 5
2 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
2 out of 5
2 out of 5
Reliability: 
2 out of 5
2 out of 5
Would you recommend this product? No
Overall Rating: 
3 out of 5
3 out of 5
Value: 
2 out of 5
2 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
2 out of 5
2 out of 5
Reliability: 
2 out of 5
2 out of 5
Dodgy unit? or not good?
2 Feb 2015
By Dude27
, High Wycombe
" BAD - Unit stopped working just 2 years after installation. Expensive product that should last a lot longer than this.
GOOD - Has lots of features including automatic update of GST/BST hour changes which is very useful and gives peace of mind. Worked great while it did.
Surely it could be cheaper though....
"
1 of 1 people found this review helpful.
Review 17 for Honeywell ST9400C Programmer
Overall Rating: 
3 out of 5
3 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
2 out of 5
2 out of 5
Would you recommend this product? Yes
Overall Rating: 
3 out of 5
3 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
2 out of 5
2 out of 5
Honeywell Programmer
19 Jan 2015
By MrFixit66
, East Sussex
" Seems like a great product marred by poor reliability. This is my third: first lasted two years; second lasted three months; jury still out on third one. But excellent customer service from Screwfix - item collected and installed less than 50 minutes after ordering on line! And their website is a doddle to use. "
Review 18 for Honeywell ST9400C Programmer
Overall Rating: 
3 out of 5
3 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
3 out of 5
3 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
3 out of 5
3 out of 5
Would you recommend this product? No
Overall Rating: 
3 out of 5
3 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
3 out of 5
3 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
3 out of 5
3 out of 5
Good but....
12 Aug 2013
By jimmy1glove
, London
" Good Programmer but not having an industry standard backplate means i needed to get an electrician in to install it, this addedd to the cost. The backplate is the same but with an aditional piece to prevent you using other manufacturers in the event of failure, If i had known this i would have opted for a Drayton , Siemens, Horstmann or any other as they all use the same backplate and interchangable with no wiring changes and no need to call out an electrician..... "
5 of 5 people found this review helpful.
Review 19 for Honeywell ST9400C Programmer
Overall Rating: 
3 out of 5
3 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
2 out of 5
2 out of 5
Would you recommend this product? No
Overall Rating: 
3 out of 5
3 out of 5
Value: 
3 out of 5
3 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
2 out of 5
2 out of 5
Good - when it works!
2 Nov 2011
By AncientMeddler
, Devon
" Good features, easy to fit. However, reliability and quality control are not up to Honeywell standards. The first controller was defective out of the box: the display wouldn't light up. Screwfix replaced it under warranty. The second unit lasted only three years before it failed: wouldn't send power to the motorised valves. I wonder how long the third unit will last?? "
1 of 1 people found this review helpful.
Review 20 for Honeywell ST9400C Programmer
Overall Rating: 
1 out of 5
1 out of 5
Value: 
1 out of 5
1 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
1 out of 5
1 out of 5
Would you recommend this product? No
Overall Rating: 
1 out of 5
1 out of 5
Value: 
1 out of 5
1 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
1 out of 5
1 out of 5
Very unreliable programmer
4 Mar 2015
By Lotusbloke
, Hertfordshire
" The Honeywell ST9400C has perfect looks, a lovely light blue large backlit display, a massive array of features such as up to 3 hour boost function and holiday hold off.
But....it's very unreliable. Without warning it WILL fail. I've now replaced two units in just under three years. Neither unit made it to eighteen months old. The fault on both occasions appears to be the internal relays fail in a weird manor. Only one circuit will switch on, either H/W or C/H but not both. The display will show them both on if both have been selected but only one circuit will be powered.
Avoid. "
2 of 2 people found this review helpful.
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