How long should boiler fire for if I press the manual switch on the receiver box?
I'm having some issues with my System only firing for short periods of time. If I have the batteries in the thermostat, I can see that it's sending the shut off signal well before temperature is reached. I read about this TPI thing, and my house does reach temperature, so I guess that's working. Feels odd that it fires for such short periods of time with such little downtime all of a sudden, just starting this behaviour yesterday. It used to fire for 20-25 minutes, downtime of 45 mins or so, repeat. Now its fire for 2-3 minutes, downtime of 5-10, repeat.
So I decided to take the batteries out of the thermostat and unplug the wifi hub.
Now when I hit the manual fire button, the boiler kicks in, but doesn't fire for very long before the bottom light on the receiver goes off and the boiler cycles down: EDIT: It took a while for the received to realise the thermostat was disconnected, it has now been firing after pressing the button for over 20 minutes with no cut out.
There are no error codes or power interruptions to the boiler in this time.
Any ideas?