Product Reviews

HoneywellST9400C7dayProgramer

HoneywellST9400C7dayProgramer
Average Customer Rating:
3.476 out of 5
3.5
 out of 
5
(21 Reviews) 21
Open Ratings Snapshot
Rating Breakdown 21 reviews
5 stars
9
4 stars
4
3 stars
2
2 stars
0
1 star
6
13 of 21(62%)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: 
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
, 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 2 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
, Gloucester
"Programmer fitted the rather older model space and is doing the job."
Review 3 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
05-Jan-2013
By
, 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."
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: 
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!
09-Mar-2012
By
, shropshire
"I've installed many of these over the years, and for ease of installation, features and reliability nothing beats it."
1 of 1 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
Excellent performer
25-Mar-2010
By
, 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 6 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
, 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 7 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
, 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"
3 of 3 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: 
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
08-Dec-2009
By
, 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 9 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
04-Feb-2009
By
, 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 10 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
01-Aug-2013
By
, 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 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: 
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
, 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 12 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
06-Dec-2012
By
, 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 13 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
, 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 14 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
, 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....."
Review 15 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!
02-Nov-2011
By
, 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??"
Review 16 for Honeywell ST9400C Programmer
Overall Rating: 
1 out of 5
1 out of 5
Value: 
1 out of 5
1 out of 5
Features: 
3 out of 5
3 out of 5
Performance: 
1 out of 5
1 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: 
3 out of 5
3 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Didn't last
05-Nov-2013
By
, York
"I bought this thinking I was buying quality and reliability - none of it.
Setting the programmes is amazing slow and clunky but I thought I could live with that.
The unit has now failed after a little more than 2 years (obviously now out of warranty) so I have to buy a replacement - don't worry it won't be a Honeywell!"
1 of 1 people found this review helpful.
Review 17 for Honeywell ST9400C Programmer
Overall Rating: 
1 out of 5
1 out of 5
Value: 
2 out of 5
2 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
1 out of 5
1 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: 
2 out of 5
2 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Too unreliable
21-Sep-2013
By
, Essex
"I have three of these controllers installed to control different parts of the house. One failed after 1 year. The controller would turn itself off and then on again every few minutes. The second failed after 2 years, the relay only turns the heating on every now and again at the designated start up times. The product is easy to set up and contains some useful features but falls down on the most important quality you need from a controller, reliability."
Review 18 for Honeywell ST9400C Programmer
Overall Rating: 
1 out of 5
1 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: 
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: 
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: 
1 out of 5
1 out of 5
Too unreliable
09-Sep-2013
By
, Reading
"Lasted about 18months and has intermittent faults
It's really annoying having no hot water when you need a shower or coming home/waking up to a cold house because it decided not to work today."
Review 19 for Honeywell ST9400C Programmer
Overall Rating: 
1 out of 5
1 out of 5
Value: 
1 out of 5
1 out of 5
Features: 
1 out of 5
1 out of 5
Performance: 
1 out of 5
1 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: 
1 out of 5
1 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Load of rubbish
11-Oct-2012
By
, Horley
"Had this piece of rubbish installed 14 months ago.
Nothing but trouble. Would only let me have either hot water or heating but not both at the same time. Was told by the fitter who came and fitted a danfoss to replace it that I was lucky to have got 14months out of it. Will not be buying any of Honeywells products in future
"
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: 
3 out of 5
3 out of 5
Performance: 
1 out of 5
1 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: 
3 out of 5
3 out of 5
Performance: 
1 out of 5
1 out of 5
Reliability: 
1 out of 5
1 out of 5
Faulty on install
23-Sep-2012
By
, Reading
"Had one of these fitted as part of a boiler replacement. Gave trouble from day one with intermittent hot water and no heating at all. Spent weeks (and money) chasing other faults around system with re-visits from Installer and Baxi (The boiler manufacturer).
Eventually decided controller was faulty, quick google of "Honeywell ST9400C Problems" revealed other people with the same issue.
Replaced with a Siemens controller from this website (for half the price!) and Heat and Hot Water were restored!"
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