This method is not compatible with all equipment . While all Carrier equipment is directly compatible (except for the TSTATXXCNV10 conversion kit), always check the installation instructions for non-Carrier equipment before proceeding.
Mount the thermostat about 5 feet above the floor in an area with good air circulation. Avoid exterior walls or direct sunlight. Step 1: Mounting the Base
The 33TBAC01 displays error codes. Here is the "top" list from the service manual:
The rear of the controller's circuit board features several DIP switches that allow for advanced configuration of the system's behavior. carrier 33tbac01 installation manual top
: Selects equipment type (e.g., AC, Heat Pump, or 2/4 pipe fan coil).
This is where the comes into play. Heat pumps require a reversing valve wire.
The (often part of the 33TB series) refers to a commercial-grade Programmable Thermostat or Zone Controller typically used in VVT (Variable Volume and Temperature) systems. This method is not compatible with all equipment
| Color | State | Indication | | :--- | :--- | :--- | | | ON | Cooling mode | | | Flashing | Frost protection mode | | Red LED | ON | Heating mode | | | Flashing | Fault (e.g., sensor failure) | | Green LED | ON | Energy Saving mode | | Yellow LED | ON | Automatic fan speed selection | | Blue & Yellow | Both ON | Automatic mode in cooling | | Red & Yellow | Both ON | Automatic mode in heating | | Blue & Red | Flashing | Auto-test mode |
Tape wires to the wall to prevent them from slipping back inside. 3. Installing the Carrier 33TBAC01 Mounting Base Go to product viewer dialog for this item.
| Switch | Setting 1 (Up/Off) | Setting 2 (Down/On) | What it changes | | :--- | :--- | :--- | :--- | | | Electric Heat | Gas/Oil Heat | Fan behavior (Gas delays fan start) | | SW2 | Standard Heat Pump | Conventional AC | Reversing valve logic (O vs B) | | SW3 | 2-pipe System | 4-pipe System | Valve control logic | | SW4 | Celsius (°C) | Fahrenheit (°F) | Display units | | SW5 | Standard (3 cycles/hr) | Comfort (6 cycles/hr) | Compressor cycling rate | | SW6 | Backlight Off | Backlight On | LCD illumination | | SW7 | Auto Fan disabled | Auto Fan enabled | Fan runs with heat/cool demand | | SW8 | 5 min compressor delay | 0 min delay | Anti-short cycle protection | Avoid exterior walls or direct sunlight
Once the cover is snapped on and power is restored, perform a manual test: Set to "On." The blower should start immediately.
Flip the primary HVAC circuit breaker back to the ON position. The digital screen layout should illuminate immediately.