Dead boiler Vailant Ecotec Pro 28

[Jajodu]

What's the display showing with the I button selected while doing this?

 

[houstonwehaveaproblem]

What's the display showing with the I button selected while doing this?

S.30 in when boiler on standby the S.97 when applying heating

looking online it says

S.97
Water pressure sensor check is running, demand (DHW or heating) is blocked

 

[Jajodu]

Does it get past s97?.

 

[houstonwehaveaproblem]

Does it get past s97?.

No it cuts out

 

[Jajodu]

I'd expect it to show a fault code. If it doesn't detect a flow, pump running. It won't fire up but it should show a fault.

 

[houstonwehaveaproblem]

I'd expect it to show a fault code. If it doesn't detect a flow, pump running. It won't fire up but it should show a fault.

no F code faults showing

 

[Jajodu]

Look in your instructions and look for d codes and how to read them. I.e. fails to light or pump errors.

 

[Jajodu]

Can you hear the pump starting?

 

[houstonwehaveaproblem]

Can you hear the pump starting?

can here a low hum not sure if it’s the pump

Gave the pressure sensor a jiggle
And checked the plug on the end

s.97 gone but same prob shutting down

 

[houstonwehaveaproblem]

Checked pump with meter and there is 240v there when heating sequence starts. That’s what’s running for 10 secs before boiler shuts down. Don’t think it’s the pump.

As before. As soon as hot tap is on boiler shuts down

 

[houstonwehaveaproblem]

Cant get an engineer here for a week at the earliest

 

[Jajodu]

Do you get the pump symbol on the display? The nomal sequence is demand, pump symbol, then gas flame symbol.
So the boiler looks for flow, if ok it then open the gas valve by activating the fan, flame supervision to detect ignition, then after a minute turns gas up to full rate.
How long before the boiler stops? That's from initial demand to stop, and when it stops it shows S30, correct.

What stumps me is there's no fault display which is what I'd expect unles the PCB has faulted.

 

[houstonwehaveaproblem]

Do you get the pump symbol on the display? The nomal sequence is demand, pump symbol, then gas flame symbol.
So the boiler looks for flow, if ok it then open the gas valve by activating the fan, flame supervision to detect ignition, then after a minute turns gas up to full rate.
How long before the boiler stops? That's from initial demand to stop, and when it stops it shows S30, correct.

What stumps me is there's no fault display which is what I'd expect unles the PCB has faulted.

I replaced the pcb with a new one and it’s fired back up!

 

[Jajodu]

That was quick. Did you have a spare?

 

[houstonwehaveaproblem]

That was quick. Did you have a spare?

Wolseley had one in stock nearby so
I shot over there before 5 and picked it up.