I have a intertherm ultraflex model nub. Feh015ha central elect

Intertherm Thermostat. I have a intertherm ultraflex model nub. Feh015ha central elect Home / Heating & Air Condition / Nordyne Miller Intertherm Replacement Parts I'd like to replace the thermostats with more modern looking thermostats

I have bought a honeywell rth7400 to replace the interthem thermostat ‎Intertherm 903994 Wall Thermostat - Heat Only White : Item Weight ‎0.01 Ounces : Voltage ‎230 Volts : Shape ‎Rectangular : Control Method ‎App : Mounting Type ‎Wall Mount : Backlight ‎No : UPC ‎786710106187 : Global Trade Identification Number ‎00786710106187 : Manufacturer ‎Intertherm :

INTERTHERM Wall Thermostat Heat/Cool in White903992 The Home Depot

my wiring terminals coming from the nordyne 911254 relay control are as follows: G T. Nordyne Miller Mobile Home OEM Digital Thermostat 919760 ‎Intertherm 903994 Wall Thermostat - Heat Only White : Item Weight ‎0.01 Ounces : Voltage ‎230 Volts : Shape ‎Rectangular : Control Method ‎App : Mounting Type ‎Wall Mount : Backlight ‎No : UPC ‎786710106187 : Global Trade Identification Number ‎00786710106187 : Manufacturer ‎Intertherm :

INTERTHERM Wall Thermostat Heat Only in White903994 The Home Depot. ‎Intertherm 903994 Wall Thermostat - Heat Only White : Item Weight ‎0.01 Ounces : Voltage ‎230 Volts : Shape ‎Rectangular : Control Method ‎App : Mounting Type ‎Wall Mount : Backlight ‎No : UPC ‎786710106187 : Global Trade Identification Number ‎00786710106187 : Manufacturer ‎Intertherm : Intertherm first made a name for itself in the heating and cooling industry in 1919

Intertherm Electric Furnace Thermostat Wiring Diagram. Can I do that w/o effecting the heaters? If I can replace them will you recommend some contemporary looking replacements? Thanks, Mike Is there something I can adjust or should I just get another.