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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
Nice to see that you're digging into the Forums @Darran616, let me give you a warm Welcome to our Community. 
You can try @WendyB suggestion, and if that doesn't help follow the steps in this post; this can help for both issues. Have you tried to manually turn off and on the Heart Rate feature on your Surge itself and then sync it? That might work!
Keep me posted.
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Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
Try a restart. Do it at least 3 times.
Restart
http://help.fitbit.com/articles/en_US/Help_article/1186/?q=restart&l=en_US&fs=Search&pn=1
If that doesn't help Contact Support.
http://help.fitbit.com/?cu=1
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
Nice to see that you're digging into the Forums @Darran616, let me give you a warm Welcome to our Community.
You can try @WendyB suggestion, and if that doesn't help follow the steps in this post; this can help for both issues. Have you tried to manually turn off and on the Heart Rate feature on your Surge itself and then sync it? That might work!
Keep me posted.
Best Answer