  We consider the Type-II seesaw model extended with another Higgs doublet,
which is odd under the $Z_2$ symmetry. We look for the possibility of
triggering the electroweak symmetry breaking via radiative effects. The Higgs
mass parameter changes sign from being positive at higher energy scales to
negative at lower energy scales in the presence of the TeV scalar triplet. The
Planck scale perturbativity is demanded and the electroweak phase transition is
studied using two-loop $\beta$-functions. The maximum allowed values for the
interaction quartic coupling of the second doublet field and the triplet field
with the Higgs field are $\lambda_3=0.15$ and $\lambda_{\Phi_{1\Delta}}=0.50$,
respectively. Considering these EW values, the first-order phase transition,
i.e., $\phi_{+}(T_c)/T_c\sim 0.6$ is satisfied only for vanishing doublet and
triplet bare mass parameters, $m_{\Phi_2}=0.0$ GeV and $m_{\Delta}=0.0$ GeV.
The small non-zero induced vacuum expectation value for the scalar triplet also
generates the neutrino mass, and the lightest stable neutral particle from the
inert doublet satisfies the dark matter constraints for the chosen parameter
space. The impact of the thermal corrections on the stability of the
electroweak vacuum is also studied, and the current experimental values of the
Higgs mass and the top mass lie in the stable region both at the zero
temperature and the finite temperature.
