The inability to adjust the temperature variance on the auxiliary heat is one reason why I no longer install Honeywell thermostats.
I called them too,close to a year ago, with this issue and was told we are sorry for the inconvenience...
Well, the inconvenience is two fold:
One: You install a new high efficiency system for a customer,( telling them it will save them energy usage) ,only to get a call back 2 months later with the customer saying that their bill is higher than normal during winter.
Two: Once at the residence I find a Honeywell installed, I have to tell the customer "The only way to repair this issue is to buy another new thermostat and have it installed".
This all leaves a bad taste in the customers mouth wondering,"Why didn't you install the most energy efficient thermostat with my new high efficiency unit?"