Heating but no hot water

[lewisplumber]

Good evening all and welcome to my question time!

I have a honeywell programer on a job and it is calling for heating and hot water. But it is only doing the heating side. If i move the 2 port over manually it works but if i let got it shuts off. I have put an electrical testing pen on the wire to see if it is live and there is power to the 2 port valve, then i turned off the switch on the programer to hot water and the cable is still saying it is live. So i am not sure if the programer is broken or the 2 port is broken. Any help welcome.

 

[WHPES]

Probably need to replace the motor on the valve (check compatibility)

Do Heating Synchronous Motor: Heating Controls Online

 

[lewisplumber]

it is a honeywell 2 port. Can i just get the top half?

 

[WHPES]

No, you take the top cover off and change the motor. The cover is held on with a small philips screw on one side and the motor is held in place with 2 small philips screws. You will also need 2 terminal block connectors

 

[PlumbBobBob]

if the top is removable and you don't feel competent changing the syncron motor you can change the whole head

 

[WHPES]

Synchron motor is easer to change than the head and a fraction of the price of a new head.

 

[AWheating]

does sound like the motor may need changing.

 

[lewisplumber]

so can i just go to my merchants and they will have a motor in stock? and 2 terminal block connectors?( the ones that have a flat bottom and curl up on the sides on to its self)

 

[WHPES]

You would be best to mail order as many plumbers merchants onl stock the complete valve. Do cross reference against the valve code.

or you can get one of these from our guy:

http://www.ukplumbersforums.co.uk/sale-wanted/28346-honeywell-2-port-valves-heads.html

google image search for terminal block connector

 

[lewisplumber]

Cheers for that. Might just swap top half as this is an old boy who needs his hot water. I will just get the 2 port from the merchants in the morning.

 

[WHPES]

If you do then you can replace the head of the other one and replace the motor at your leisure, then attach it to the spare body and you have a functioning motorised valve to add to your spares inventory for free for another time

 

[lewisplumber]

Good thinking. All i need now is time to do it. We are flat out at work!

 

[diamondgas]

Hi Lewisplumber .... Just a recap on your original question and something worth checking B4 you replace the motor ... When you say electrical testing pen I'm assuming you mean the type that glow if they detect the presence of a live wire. Zone valves will always set this pens off as they have a permanent live to them. To confirm that it's the motor that's at fault you really need to verify that you have a 240v between the brown and blue of the motor 🙂

That said though, the most likely suspect will be the motor 🙂

 

[PlumbBobBob]

there's only one thing worse than a volt stick and that's a neon screwdriver imho. don't get me wrong a volt stick is handy just in the right place.

 

[diamondgas]

there's only one thing worse than a volt stick and that's a neon screwdriver imho. don't get me wrong a volt stick is handy just in the right place.

iagree: they are handy when you want to know the presence of electricity but they tell you very little else ... 🙂

 

[lewisplumber]

Job done. It was the motor Or 2 port. Just replaced the top half of the 2 port as i knew that when i moved it over manually the pipe work got hot. All up and running now. Cheers for the input though lads it all helps.

 

[PlumbBobBob]

glad you got it sorted, happy to help.