Insteon Brand Thermostat Not Working

Just installed an Insteon Thermostat and it is not working. I’m just now noticing the altsteon docs mention venstar thermostats specifically. Should I be using those instead?

It will only show the ambient temperature.

Using altsteon cli:
get_temp – works as expected (returns Ambient temperature)
get_zone_info 0 0 – works as expected (returns Ambient temperature)
get_zone_info 0 1 – works as expected (returns heat setpoint)
program_heat – returns error “checksum is incorrect”
set_heat_setpoint – returns error “checksum is incorrect”