Radiator goes on, boiler goes off!!

[mikeyc]

Hi folks

I hoping someone here will be able to fix my boiler problems ...

I have just replaced a rad but it refuses to warm up. The reason being the boiler shuts off as soon as the new rad valve is opened.

I can still (and have) run all the other rads for hours with no problem but as soon as the new valve is opened the boiler dies 😕

I have tried turning off all other rads and opening just the new one but the same happens.

The system has been 'bled / bleeded'?? and all air seems to be gone.

Can anyone give some suggestions?

Many thanks

Mike

 

[stevetheplumber]

Hi folks

I hoping someone here will be able to fix my boiler problems ...

I have just replaced a rad but it refuses to warm up. The reason being the boiler shuts off as soon as the new rad valve is opened.

I can still (and have) run all the other rads for hours with no problem but as soon as the new valve is opened the boiler dies 😕

I have tried turning off all other rads and opening just the new one but the same happens.

The system has been 'bled / bleeded'?? and all air seems to be gone.

Can anyone give some suggestions?

Many thanks

Mike

need more details boiler make system type what you actually did to rad ?

 

[REDSAW]

combi boiler/system,?
top up the pressure.

 

[mikeyc]

combi boiler/system,?
top up the pressure.

I have a (pretty old 15/20 yrs) valliant gas combi boiler - not sure what model but it's being replaced soon.

As the new rad is shorter than the original (but now a double) I had to move the pipework. However, all I did was cut a section from each pipe under the floor and then reconnect with straight compression fittings. Nothing else has changed and the previous rad worked fine before it was removed.

The pressure has been checked and is fine, no loss of pressure.

Hope this helps - thanks for your reply!