Some common technical issues of Hunter thermostats are mentioned in these tables. Here, you can find possible technical problems and the ways to fix the issues on one’s own. The troubleshooting instructions were provided by the manufacturer. Each manual is written in layman’s terms and is easy to follow: step-by-step instructions will help you to solve issues without repairmen’s help.
Hunter 42203 Thermostat Troubleshooting
| Problem | Cause |
|---|---|
| My display does not appear. | Check the batteries and battery connections. |
| Reset the thermostat. | |
| The auto fan feature does not operate properly. | Check to see if the correct furnace type is selected under the system settings in options. |
| My display is erratic. | Replace the batteries. |
| The program will not change at my desired setting. | Check that the time is set properly to AM and PM. |
| Make sure the thermostat is not in permanent override mode. | |
| Check that the day setting is correct. | |
| Check that the time is set properly to AM and PM. | |
| The heating or cooling will not turn on or off | Make sure the thermostat is not in permanent override mode. |
| Wait. There may be as much as a 4-minute delay before the system turns on or off to protect the compressor. | |
| Check circuit breakers and switches to ensure there is enough power to the system. | |
| Replace batteries. | |
| If applicable, make sure the furnace blower door is closed properly. | |
| If your system has 4 wires, ensure the jumper is installed between the RC and RH terminals. | |
| The display comes on but does not stay illuminated | Replace batteries. |
| My system continues to operate when the thermostat is in the off position | Replace unit. |
Hunter 40135 Thermostat Troubleshooting
| Problem | Cause |
|---|---|
| My heating or cooling will not turn on or off | Check the HE/HG Switch to ensure it is set to the correct position |
| Wait. There may be as much as a 4-minute delay before the system turns on or off to protect the compressor | |
| Check the circuit breakers and switches to ensure there is enough power to the system | |
| Replace the batteries with fresh AA alkaline batteries | |
| If applicable, make sure the furnace blower door is closed properly | |
| . If your system has 4 wires, ensure the jumper wire is installed between the RC and RH terminals | |
| My system continues to operate when the thermostat is in the off position | Replace unit |
Hunter 44200 Thermostat Troubleshooting
| Problem | Solution |
|---|---|
| SCRAMBLED OR DOUBLE DISPLAY (numbers over numbers) | 1. Remove clear mylar sticker. |
| NO DISPLAY | 1. Check battery connections and batteries. |
| 2. Press reset button once with a small pin and hold in for two seconds. | |
| ENTIRE DISPLAY DIMS | 1. Replace batteries. |
| PROGRAM DOES NOT CHANGE AT YOUR DESIRED SETTING | 1. Check that time is set properly to "AM" or “PM." |
| 2. Check that thermostat is not in "HOLD" mode. | |
| 3. Check for correct day setting. | |
| AUTO/FAN DOES NOT COME ON | 1. Move HG/HE system selector to opposite position. |
Hunter 42177 Thermostat Troubleshooting
| Problem | Solution |
|---|---|
| No display | Check battery connections and batteries |
| Press RESET button with a small pin and hold in for two seconds | |
| Entire Display Dims | Replace Batteries |
| Auto / Fan does not turn on | Move HG/HE switch to opposite position |
| Heating or Cooling Does Not Go On or Off | Check that the function switch is in the correct position ("HEAT" or "COOL") |
| There may be as much as 4-minute delay before the system turns On - wait a check. (Compressor protection delay.) | |
| Check your circuit breakers and switches to ensure there is power to the syste | |
| Replace batteries | |
| Make sure your furnace blower door is closed properly | |
| Thermostat permanently reads "HI", "LO", or "Er" | Press the reset button once with a small pin and hold for two seconds |
Hunter 44260 Thermostat Troubleshooting
| Problem | Solution |
|---|---|
| No Display | Check battery connections and batteries. |
| Press RESET button with a small pin and hold in for two seconds | |
| Entire Display Dims | Replace Batteries |
| Program Does Not Change at your Desired Setting | Check that the time is set properly to "AM" or "PM". |
| Check that the thermostat is not in Permanent HOLD mode. | |
| Check for the correct day setting. | |
| Auto Fan Does Not Turn On Properly | Move HG/HE selector to correct position. |
| Heating or Cooling Does Not Go On or Off | Check that the function switch is in the conect position ("HEAT" or "COOL"). |
| There may be as much as 4-minute delay before the system turns On - wait and check. (Compressor protection delay.) | |
| Check your circuit breakers and switches to ensure there is power to the system. | |
| Replace batteries. | |
| Make sure your furnace blower door is closed properly. | |
| If your non-heat pump system only uses 4-wires, be sure the jumper wire is installed between the RC and RH terminals. | |
| Check the position of the System Selector switch: Standard or Heat Pump. | |
| Erratic Display | Press the reset button once with a small pin and hold for two seconds. Then reprogram. |
| If unit continues to operate in the Off position | Replace unit. |
| Thermostat permanently reads "HI", "LO", or "ERR" | Replace unit. |
Hunter Thermostat 44905 Troubleshooting
| Problem | Solution |
|---|---|
| No display | Check battery position and battery life |
| Program does not change at desired setting | 1. Check the time in all programs for proper AM/PM time. |
| 2. Ensure thermostat is not in "Save Away" mode. | |
| 3. Make sure the thermostat is set to the proper day | |
| Auto / Fan does not turn on | 1. Check the HG/HE setting under System in Menu options. |
| 2. Check the fan setting and make sure that it is not set to off | |
| Fan runs continuously | 1. Check fan setting to see if it is set to on. |
| 2. Check the HG/HE setting under System in Menu options | |
| Heating or cooling does not turn on or off | 1. Check the system is in the right mode (heat or cool). |
| 3. Be sure to wait up to 4 minutes for system protection if your system was just on. | |
| 4. Check breakers to make sure power is getting to your system | |
| 5. Replace the batteries |