U7 fault code Worcester 37 cdi combi

[Inverness]

hi guys went to a breakdown today. No hot water and the numbers keep rising up to 97. I can't find fault code in manual?! I think it's something to do with the pump not circulating and over heating? Also I noticed when I was there the vertical flue runs in through the middle of the property into the loft space but there isn't any hatches to check out the flue? And the terminal is less 1.5 meters from a roof vent tile.

 

[Scott_D]

AR if you cant inspect the flue properly

 

[Inverness]

There is sticker already on the boiler saying AR. I new too all this so I hope you don't mind me asking. If there is 2 at risks it is id? Like the terminal too close to the roof tile vent? When I complete the service do I mama ke recommendation about hatches to inspect the flue with co2 alarm 300mm x 300mm at 1.5m each joint.

 

[sammathias]

Surely if it's at risk it should not be in operation...I don't know what you guys do over the country but down here at risk means isolate appliance and attach notice and i.d is disconnect and cap appliance and attach notice....

 

[ambrosia]

theres smarter guys on here than me but the the 2 faults thing was for open flue appliances and is no longer in effect, but as i recall it was 2 ncs = an AR

 

[ambrosia]

did you run the heating, if the heating is not working as well you should be taking a close look at the pump, if heating is fine i'd be looking at the diverter valve.
once youre stasisfied with the flue of course

 

[Harvest Fields]

Surely if it's at risk it should not be in operation...I don't know what you guys do over the country but down here at risk means isolate appliance and attach notice and i.d is disconnect and cap appliance and attach notice..

The problem is mate, is that AR isn’t a disconnect. It is isolate at user controls. Which means you get called back again at some point as the user has ignored your warning notice and switched it back on themselves and moan that it is broken even when they shouldn’t be using it. I had an agent try and tell me once that I haven’t switched a boiler off, I went mental at them. Why in the hell would I fill out a notice and attach a label and leave the thing running. #ihaveaconscience

 

[Inverness]

There's power to the pump but it's not spinning when I turn on a dhw tap. Pump replaced.
I isolated the appliance and explain to the client don't use well they can't anyway until I replace the pump.

 

[Last Plumber]

terminal is less 1.5 meters from a roof vent tile

Are you on the right type of flue?
Can you not see the flue in the loft?

 

[Last Plumber]

There's power to the pump but it's not spinning when I turn on a dhw tap

Did you test L + N at the pump (when you say it had power to it)?

 

[Inverness]

I put a volt pen to the cable feeding pump and power was on.

 

[Harvest Fields]

I put a volt pen to the cable feeding pump and power was on.

Volt pen will
Light with static or 24v not proven to test just 240v

 

[Inverness]

Alright. I take it with a multimeter you would connect the red and black needles in the pcb where the pump live and netual wires are?

 

[Harvest Fields]

Alright. I take it with a multimeter you would connect the red and black needles in the pcb where the pump live and netual wires are?

Or at the pump If there is space to do so.

 

[sammathias]

The problem is mate, is that AR isn’t a disconnect. It is isolate at user controls. Which means you get called back again at some point as the user has ignored your warning notice and switched it back on themselves and moan that it is broken even when they shouldn’t be using it. I had an agent try and tell me once that I haven’t switched a boiler off, I went mental at them. Why in the hell would I fill out a notice and attach a label and leave the thing running. #ihaveaconscience

Didn't say you disconnect an at risk appliance fella.

 

[Harvest Fields]

Didn't say you disconnect an at risk appliance fella.

I know mate. It wasn’t aimed at you. I was having a rant about the catorgories

 

[Last Plumber]

I put a volt pen to the cable feeding pump and power was on.

Volt pen is no good for testing that type of thing.
Always test you have a Neutral as well as Live.

 

[Inverness]

I replaced the pump head now it works. I think the diverted valve was sticking on the green rubber cover. Strange

 

[Inverness]

I also installed new access panels where the flue passed and inspected the flue joints and clipped on every joint. All good. Cheers

 

[dan_the_plumber]

Get yourself an auto ranging multimeter. If there’s 240v across live and neutral at the pump and the pump is not spinning the the pump is either sticking or is electrically broken.