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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hi @FraserButt, I've noticed you are new around, so let me give you a warm welcome to our Community. 
Thanks for posting your question here, sorry that the HR option on your Surge is not working working. Have you checked if this option is "On" or "Auto"? You can try to do the next steps:
1. Press and hold the Home and Select buttons (left and bottom right) for 10 to 15 seconds, until you see the screen flash or start to dim.
2. Let go of the buttons.
3. After your screen turns completely off, wait 10 seconds and press the Home button to turn your Surge back on.
After you've done so, please turn off the HR on your Surge Settings and force sync it. Later on turn it back on with the option "Auto" and sync it again.
Give it a shot and let me know if this worked for you! 
Best Answer
Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hi @FraserButt, I've noticed you are new around, so let me give you a warm welcome to our Community.
Thanks for posting your question here, sorry that the HR option on your Surge is not working working. Have you checked if this option is "On" or "Auto"? You can try to do the next steps:
1. Press and hold the Home and Select buttons (left and bottom right) for 10 to 15 seconds, until you see the screen flash or start to dim.
2. Let go of the buttons.
3. After your screen turns completely off, wait 10 seconds and press the Home button to turn your Surge back on.
After you've done so, please turn off the HR on your Surge Settings and force sync it. Later on turn it back on with the option "Auto" and sync it again.
Give it a shot and let me know if this worked for you!
Best Answer
Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Thanks for getting back @FraserButt! Thanks for joining us @ashfor! So glad to know that this worked for you! 
Feel free to come back at any time, in case that you have questions about your Fitbit; or you can just hand around, there is plenty information here and new ways to make friends. Please take a moment to visit our Discussions board where you will find other members sharing their experiences and tips.
This is a really good way to stay motivated towards your goals. In case that you haven't do so, check it out! You might be interested in these topics: Saturday Humor or What is the most interesting place that you have walked run?
Have a good one! 
Best Answer