Hunter Thermostat Troubleshooting

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 offMake 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 illuminatedReplace batteries.
My system continues to operate when the thermostat is in the off positionReplace unit.

Hunter F42213 Thermostat Troubleshooting

ProblemSolution
No Display1. Check battery connections and batteries.
2. Press reset button with a small pin and hold in for two seconds.
Entire Display Dims or Flashes1. Replace batteries.
Program Does Not Change at1. Check that time is set properly to "AM" or "PM!'
Your Desired Setting2. Check that thermostat is not in "HOLD mode.
3. Check for correct day setting.
Heating or Cooling Does Not Go On or Off1. Check that function switch is in correct position ("HEAT" or "COOL").
2. There may be as much as 10 seconds delay in the thermostat turning the system on—wait and check.
3. Check your circuit breakers and switches to ensure that there is power to the system.
4. Replace batteries.
Erratic Display1. Press the reset button once with a small pin and hold in for two seconds. Then reprogram.

Hunter 40135 Thermostat Troubleshooting

Problem Cause
My heating or cooling will not turn on or offCheck 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 positionReplace unit

Hunter 44200 Thermostat Troubleshooting

ProblemSolution
SCRAMBLED OR DOUBLE DISPLAY (numbers over numbers)1. Remove clear mylar sticker.
NO DISPLAY1. Check battery connections and batteries.
2. Press reset button once with a small pin and hold in for two seconds.
ENTIRE DISPLAY DIMS1. Replace batteries.
PROGRAM DOES NOT CHANGE AT YOUR DESIRED SETTING1. 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 ON1. Move HG/HE system selector to opposite position.

Hunter 42177 Thermostat Troubleshooting

Problem Solution
No displayCheck battery connections and batteries
Press RESET button with a small pin and hold in for two seconds
Entire Display DimsReplace Batteries
Auto / Fan does not turn onMove HG/HE switch to opposite position
Heating or Cooling Does Not Go On or OffCheck 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 DisplayCheck battery connections and batteries.
Press RESET button with a small pin and hold in for two seconds
Entire Display DimsReplace Batteries
Program Does Not Change at your Desired SettingCheck 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 ProperlyMove HG/HE selector to correct position.
Heating or Cooling Does Not Go On or OffCheck 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 DisplayPress the reset button once with a small pin and hold for two seconds. Then reprogram.
If unit continues to operate in the Off positionReplace unit.
Thermostat permanently reads "HI", "LO", or "ERR"Replace unit.

Hunter 42711-01 Thermostat Troubleshooting

Problem Solution
My display will not come onCheck batteries and battery connections
Reset the thermostat
The auto fan feature will not operate properlyRemove the thermostat from the wall plate and set the HG/HE switch to the correct position
My display is erraticReset the thermostat and reprogram your settings
The program will not change at my desired settingCheck that the time is set properly to AM or PM
Make sure the thermostat is not in permanent override mode
Check that the day setting is correct
My heating or cooling will not turn on or offCheck the Heat/Cool function switch to ensure it is set to the desired 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
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
The display will come on, but it will not stay illuminatedReplace batteries
My system continues to operate when the thermostat is in the off positionReplace unit
The LCD screen permanently reads HI, LO, or ERRReplace unit

Hunter Thermostat 44905 Troubleshooting

Problem Solution
No displayCheck battery position and battery life
Program does not change at desired setting1. 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 on1. 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 continuously1. 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 off1. 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