  One of the cleanest signatures of a heavy Higgs boson in models with
vectorlike leptons is $H\to e_4^\pm \ell^\mp \to h\ell^+\ell^-$ which, in two
Higgs doublet model type-II, can even be the dominant decay mode of heavy
Higgses. Among the decay modes of the standard model like Higgs boson, $h$, we
consider $b \bar b$ and $\gamma \gamma$ as representative channels with sizable
and negligible background, respectively. We obtained new model independent
limits on production cross section for this process from recasting existing
experimental searches and interpret them within the two Higgs doublet model. In
addition, we show that these limits can be improved by about two orders of
magnitude with appropriate selection cuts immediately with existing data sets.
We also discuss expected sensitivities with integrated luminosity up to 3
ab$^{-1}$ and present a brief overview of other channels.
