Nest Thermostat issue. Manual works, hot water works on app, heating doesn’t

[Harecx]

Nest issues please help.

Heating won’t turn on by using thermostat on wall or app, it says it is in (orange) but doesn’t start the boiler.

Manual override in heat link works for heating and hot water, turns on boiler and the heating comes on with hot water.

Hot water turns on when using app and boiler ignites.

I’ve tried a reset back to factory settings.

Any ideas? Thanks 

[TudorL]

Hi there and thanks for reaching our Community. I'm sorry to hear about your issue, but I'll do my best to help you out. It seems that the Heat Link lost the connection with the display. Please follow these steps and let me know if the issue got solved: 

Turn off the WiFi router.
1. Reset the Heat Link by keeping th e button on it pressed for 30 seconds until the LED goes slowly pulsing blue.
2. Take the thermostat off the base and give it a restart, off the base by holding the display and the back of the thermostat pressed for 10-12 seconds. (Hamburger reset) 
3. While the thermostat is restarting, do not put it back on the base yet, but instead, reset the Heat Link again just like before.
4. After the Heat Link is reset, put the thermostat back on the base when it asks you to do so on the screen. 
5. Go to: Replace Heat Link (underneath the H71 error code) and enter the 6 character entry key from the Heat Link, but do not connect just yet.
6. Restart the Heat Link twice (1 restart is a 10 seconds press, until the LED goes off once). 
7. Press connect on the display.

[Frustratedddd]

I THINK they mean the thermostat dial shows orange, callingfor heat!

Not Heat Link lost connection.

[AlexD]

Hi, I wanted to check in. Did you see my colleague's message?

Make sure to let us know how things are going. As @Frustratedddd mentioned my colleague may not have understood your situation exactly. Keep us posted on how we can assist. 

[Vladut]

Hi there, just checking in with you. Did you manage to check my colleague's last message?
 

[Harecx]

Hi all, the issue was down to the Honeywell motorised valve, it had got stuck but has freed up again now 

[Vladut · Accepted solution]

That's great. Let me know if you need anything else. I'm one message away!

[Harecx]

Will do thanks 

[Vladut]

Have a good one!

[TREVORT]

Hi I have a similar issue to the opening poster. The thermostat will not fire up my Vaillant boiler. I have a Heat Link in the upstairs airing cupboard and if I turn this on, the thermostat shows ‘Manual’ and the boiler fires up. This is the only way to get heating although I can’t work out how to raise the temperature when in Manual mode. The boiler will heat until it reaches a certain temperature but I can’t change whatever that set point is!

Obviously I can’t keep it on Manual so does anyone have any ideas on what might be the problem?

[TREVORT]

Meant to say I have tried Factory Reset 3 times but the problem is the same.