Separate the complaint by floor, zone and schedule
For Elk Grove service, identify the thermostat calling for heating or cooling and the rooms that are not responding. A two-floor comfort difference should be described separately from a system that does not run at all.
For a replacement estimate, include any remodel or room-use change since the existing system was installed. Heco can then discuss capacity and distribution together instead of copying the old unit's nominal size.
For gas & propane wall furnace repair, bring floor-by-floor performance into the scope discussion. Identify the brand, model and fuel before discussing repair or replacement. Williams and other wall-heater product families have different designs and part requirements. Any fuel conversion must use approved equipment-specific methods and qualified installation.