Powermax 135 problems

[gaj2222]

I have a powermax 135. CH stopped on Fri. Hw working Ok.Pump hot and also slight leak.Changed pump also isolating valve either side as they decided to leak when turned off so had to drain down and refill.Restarted and burner ran until water was hot.Then nothing.Burner will not fire at all even on continuous setting.No voltage on pump when CH selected.Display on clock looks ok.Tried restting clock (enter and minus) no joy.Have voltage between "Heating on" terminal and neutral on back of clock when CH is selected.Does anyone have any ideas?

 

[Boilerman2]

Is the Room Thermostat calling for heat??

 

[gaj2222]

yes turned it up to 30 c.

 

[gazthepottertonengineer]

Is hot water still working even when it's on timed on rocker switch if not its programmer that's knackered! Common problem!

 

[gaj2222]

Gaz- no.not working now with switch in either setting.

 

[Terry7556]

gaj have a look on ebay, i think theres a guy on there that repairs these programmers
his name is andy twose

 

[gaj2222]

thanks for replies.Have now sorted it out- the limit stat had tripped when the boiler was heating up after refilling-possibly still air in heat store.reset that and burner fired ok.CH would still not work so I rechecked for voltage on pump terminals and found loose connection on live.Cable ends cannot be secured tightly as they are held by plastic clips which are pants.(flomasta pump from Screwfix).Found loads of useful info on Interparts site-full installation, servicing and fault finding instructions,diagrams etc.Happy Days