The band were signed to Peter Stormares record label StormVox, and in 2008 the debut album H.E.A.T was released. In 2011, they signed with GAIN music (Sony). In 2007, they were an opening act to Toto, and the following year they were the opening act to Sabaton and Alice Cooper, as well as performed at the Sweden Rock Festival that year. They were also awarded with the Årets nykomlingar award.
In 2009, the band played at the Melodifestivalen 2009, the Swedish qualifier to the annual Eurovision Song Contest, making it to the final round with the song "1000 Miles". The band have also toured around Europe as an opening act to Edguy. Freedom Rock was ranked in the top 10 AOR/Melodic Rock albums of 2010 by Classic Rock Magazine.
H.E.A.T released their third studio album, Address the Nation, on 28 March 2012. 2014 saw the return of the much anticipated new album Tearing Down the Walls, and in October 2014 the band headlined the last ever Firefest concert at Rock City in Nottingham, England. H.E.A.T released H.E.A.T II on 21 February 2020. The band had to postpone many tour dates until 2021 due to the COVID-19 pandemic.
On 30 October 2020, the band announced via their official Facebook page that original singer Kenny Leckremo has rejoined the band replacing Erik Grönwall who was pursuing other projects and later joining Skid Row. In 2022, the new lineup released their new album Force Majeure, their first with Leckremo since 2010's Freedom Rock. In March 2023 H.E.A.T released a standalone single entitled "Freedom" on their YouTube channel.