Grant Combi 70 Oil Boiler Timer Issue

[Onward]

Hi All

I wonder if anyone has come across and can help me with this issue?

I have a Grant Combi 70 oil central heating boiler, which is fully operational when manually operated. The boiler has an ACL Type 711 7-day single channel electronic timeswitch. The issue is that the timer switch is coming on at the correct set time but not firing the boiler. All switches on the boiler are correctly set for timed operation.

Can anyone help me regarding how to troubleshoot this please?

Many thanks.

 

[dave2]

Just because the timer shows the correct time for firing the boiler does not mean that a signal has passed to the boiler.

You will need to check that there is a switched live to the boiler when the timer is operational.

 

[Steve3948]

Is this a new install or existing, if new do you have a link between L & 1 (COM)