Swapped radiator now boiler won’t fire up

[Jordan87]

Swapped bathroom radiator, bled radiators and topped up pressure to 1.5 but my Worcester greenstar 28i junior won’t fire up (it was absolutely fine before this).
It’s flashing blue light (mainly off) and reset flashing too.
It sounds like it is making attempts to fire up but after a few attempts times out and asked to be reset again.
I cannot think of any reason why swapping a rad would cause this so any help much appreciated.
Many thanks

 

[foxhole]

Like this?

 

[kidgreen61]

If you've drained the system, you'll need the air from the heat exchanger.

 

[Jordan87]

No more this

 

[Jordan87]

Just an update on this:

I reset again this morning now I have hot water so at least we can finally have a shower

Downside is the central heating still won’t come on

 

[Johntheo5]

Is it attempting to come on?, if so, immediately after using hot water c/o to CH and see if the pressure gauge on the boiler front is fluctuating or stays steady.

 

[Jordan87]

Is it attempting to come on?, if so, immediately after using hot water c/o to CH and see if the pressure gauge on the boiler front is fluctuating or stays steady.

Unfortunately it isn’t attempting to come on.

 

[ianmcd]

you have to bleed the main heat exchanger

 

[Jordan87]

you have to bleed the main heat exchanger

Can you elaborate on that on how I do it please.

 

[ianmcd]

At the top of the heat exchaanger there is a plastic bayonet fitting with a clear hose coming off, turn the bayonet until water comes out of the tube, be carefull the water may be extremely hot

 

[Jordan87]

At the top of the heat exchaanger there is a plastic bayonet fitting with a clear hose coming off, turn the bayonet until water comes out of the tube, be carefull the water may be extremely hot

Ah if I knew you I would owe you a drink sir.
It’s sorted now many thanks

 

[Jordan87]

If you've drained the system, you'll need the air from the heat exchanger.

Many thanks for this, it was that.

 

[kidgreen61]

Many thanks for this, it was that.

As I suggested some time ago

 

[Johntheo5]

At the top of the heat exchaanger there is a plastic bayonet fitting with a clear hose coming off, turn the bayonet until water comes out of the tube, be carefull the water may be extremely hot

Is that unique to Worcester boilers?, I think most boilers do have AAVs, but inside the boiler casing and are generally shut off after venting tp prevent leakage.

 

[ianmcd]

Is that unique to Worcester boilers?, I think most boilers do have AAVs, but inside the boiler casing and are generally shut off after venting tp prevent leakage.

unique to the Ri range of WB although i seem to remeber an ariston with similar