Heating on permanently

[Danhumby]

I recently updated my broadband provider and have since been having problems with my Nest. I successfully updated the settings and both my thermostat and HeatLink are connected, but the heating is on permanently. 

Troubleshooting steps so far (without success):

• Factory reset thermostat
• Restarted HeatLink
• Checked heating schedule (hot water scheduled to come on, but heating not scheduled)
• Learning themostat mode off
• Checked Eco mode heat setting
• Put thermostat in both eco mode and Heat off, but heating fires on both settings

I’m at a loss, and currently have the boiler off altogether, but am having to switch it on every couple of days to get hot water.

Setup: Glowworm Combi Boiler + Gledhill unvented cylinder

HELP!

[Frustratedddd]

Try this to comfirm he Heat Link is working. Turn the display to low ie 10, then turn the display up to call for heat say 27, and listen for a click at the Heat Link. By turning the display up and down you should hear a click noise. You may need 2 people depending how fay the 2 are away.