Myson Apollo 30si CH not working

[pinn73]

Hi,

in the last few days the CH has started to refuse to light up. The HW works fine, but even when I switch boiler to CH & HW, the CH doesn't work.

Any ideas what it might be so I don't get over charged by the engineer?

Thanks

 

[GforceJames]

Need more information, e,g. Boiler make and model ande system type.

James

 

[GforceJames]

Me feel stupid didnt read title properly.

 

[GforceJames]

Could be a problem with either the motorised valve or room thermostat, when you turn the heating on check to see if the valve motors open.

James

 

[pinn73]

The room thermostat is on full, but as you say could be broke.
Re the valve, I can't hear the boiler do anything when I switch the CH heating on.How would I check if the valve was openin?

Any ideas how much either would be to sort?


ta

 

[GforceJames]

Do you have an airing cupboard with your hot water cylinder in.

Should either have 1 3port valve or 2 2port valves, in theory depending on system.

James

 

[pinn73]

Right, got my hot water cylinder with my thermostat on (set to 70). Where abouts would these valves be?

Thanks for the assistance btw.

 

[pinn73]

Mate you are a god send. I had been fiddling around outside near the boiler. Had a look in the airing cupboard and found a box saying auto/ manual. Flipped it over to manual then it slid back to auto. Tried the CH and it fired up first time. w00t, I'm going to enjoy the tropical heat.

Thanks

 

[GforceJames]

Normally in the airing cupboard they normally look like a brass body with either a silver box on top or a white plastic box on top.

Like this

http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=102632&ts=78228&id=31421

or

http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=102632&ts=78228&id=31480

James

 

[GforceJames]

Great glad I could help.

James

 

[pinn73]

Me again. The valve is the issue. CH worked fine so set the timer to have it on this AM. It didn't come on and I had to use the manual/auto switch and then it went on fine.

If I am going to open up the valve, what should I be looking at inside to check?

Thanks

 

[GforceJames]

What type of valve is it, I,e Honeywell etc.
Normally easier to change the acutuator (head), than try and repair the unit.

James

 

[pinn73]

Hi,

it's a mid-position valve and I think it says Danfoss on it ( difficult to make out)

 

[pinn73]

pretty sure its this one

http://www.heatingcontrolsonline.co...3-22mm-midposition-motorised-valve-p-285.html