  Recently, it was suggested that the 17 keV neutrino does not mix with the
electron neutrino in the weak interactions. Instead, the $\beta$ decay mode
involving the 17 keV neutrino is induced by a completely new interaction,
presumably mediated by leptoquarks. A previous model for the ``unmixed 17 keV
neutrino" suffers from difficulties with experimental data and cosmological
constraints. Here we present an alternative model in which these difficulties
are resolved.
