  The energy dependent thermoelectric response of a single molecule contains
valuable information about its transmission function and its excited states.
However, measuring it requires devices that can efficiently heat up one side of
the molecule while being able to tune its electrochemical potential over a wide
energy range. Furthermore, to increase junction stability devices need to
operate at cryogenic temperatures. In this work we report on a new device
architecture to study the thermoelectric properties and the conductance of
single molecules simultaneously over a wide energy range. We employ a sample
heater in direct contact with the metallic electrodes contacting the single
molecule which allows us to apply temperature biases up to $\Delta T = 60$K
with minimal heating of the molecular junction. This makes these devices
compatible with base temperatures $T_\mathrm{bath} <2$K and enables studies in
the linear ($\Delta T \ll T_\mathrm{molecule}$) and non-linear ($\Delta T \gg
T_\mathrm{molecule}$) thermoelectric transport regimes.
