"I recently had a Synchronous Motor failure which stopped several radiators working. After several tests of the system I discovered that it was the motor and is definitely needed replacing.
My first port of call was the Screw Fix website. It offered the correct information needed and a great discounted price.
The Drayton Synchronous Motor was extremely easy to fit, The Lugs on this replacement motor aligned and matched the Honeywell Synchronous Motor threaded holes and the unit took approximately 5 minutes to fit.
I cut the the cable ends and used the supplied wire protective caps to join up to the existing wiring, I switched it on and it worked first time.
"This motor was a direct replacement for the one in my Danfoss HP22 two way valve. As some other reviewers have said the usual problem is not failure of the motor itself but the small drive gear which over time is prone to high wear that can ultimately result in the valve 'hanging up' and therefore not operating the micro-switch that shuts the boiler down.
The kit from Screwfix also included two new crimp connections and new securing screws. In addition, the replacement is made in USA as per the original item. Obviously its too early to comment on reliability but I would highly recommend it."
"Don't know what other people's valves are like,mines is a danfoss. Reading other reviews and being an engineer I thought this would be an easy 5 min job as said by some but it definetly wasn't.
Product is a direct replacement for the motor already in my danfoss valve and is very simple, yet a little fiddly, to replace. Comes with crimp connectors supplied. For the cheapness of the item compared to a new valve I give it 5 stars.
Should maybe be added to description that soldering may be required. Lucky I had a soldering iron!"
"Easy 10min install (unless you try to amputate your thumb with a Stanley knife, then takes half an hour!!). Cheap cure for failing CH system, constantly overheating as motorized valve not closing. Highly recommended. Also bought wireless room thermostat, but will wait until I have the use of both thumbs before I install!!! Would recommend wire strippers instead of a Stanley knife!!!"
"Purchased this after noticing that our radiators were getting hot with just hot water set on the programmer. The 3 way valve seemed to be working ok visually but must be playing up so it was certainly easier to try a new motor than changing a valve.The motor was changed in about 20 minutes, made easier by having spade connectors fitted already, tested and it worked and problem solved. So I would definitely recommend trying a new motor before the valve. Have given 4 stars for reliability as its only been fitted for a week, otherwise, very pleased with this solution. Thank you."
"After reading reviews I ordered this motor to replace a original honeywell motor from a 3 position valve. The original had lasted for 25 years. It was a identical unit and fitted in minutes. Supplied with crimps to join the wires. I am a electrician so had crimpers to make a good connection. Cant say about reliability yet but works perfectly."
"Have a Horstmann F222 two way zone valve that was playing up. Picked one of these up after reading other reviews. Easy to change (2 screws) and used soldering iron to remove 2 wires from tiny PCB and re-soldered new wires in, works a treat.
The motor is made by Synchron (USA), who, I think, are the original manufacturer of these motors. Its a shame that Horstmann chose to fit inferior motors that only last a year or two.."
"This is the second replacement motor bought from Screwfix to keep a now 22yr old Honeywell valve running. The previous one has lasted nearly 10 years, and fitting is so simple, a 5 min job. Click and collect from the local depot was effortless, thank you!"