Bryant Thermostat Troubleshooting

The tables below are troubleshooting instructions for different models of Bryant Thermostat brand. They enlist the most widespread technical problems and suggest possible causes and solutions. Each manual covers the whole range of issues starting from temperature displaying and finishing by the failure of WiFi programming options. The tables with step-by-step instructions are pretty simple for understanding, and most troubleshooting measures can be taken on one’s own. But if you hesitate, hire a repairman to do the tasks for you in a more professional way.

Bryant Dual Fuel Thermostat Troubleshooting

SYMPTOMWHAT TO CHECK
No LCD on temperature displayCheck for 24 VAC between R and C at terminal connections. Both R and C must be connected for proper operation.
'Trouble" on temperature displayOutdoor temperature sensor reading out of range. An attempt to read outdoor temperature results in on display. Check for shorted, open, or failed outdoor temperature sensor.
"E2" on temperature displayBrownout condition or too low of voltage to thermostat. Double check wiring and check for 24 VAC between R and C. E2 will clear 15 seconds after proper voltaqe is restored.
"E1" on temperature displayTemperature sensor reading out of range. Check sensor for damage. If recycling power does not clear display, thermostat should be replaced.
"Clean Filter" on temperature displayAfter the selected number of hours of blower operation "clean filter" will display on LCD. This is to remind the homeowner to "check" filter. Press "reset filter button to clear display and reset timer to 0.
Cooling will not come onSelect COOL mode. Decrease cooling setpoint to 10 degrees below room temperature. Simultaneously press FAN and INCREASE TEMPERATURE buttons to defeat timers. Check for 24 VAC at Y/Y2 terminal. If present, thermostat is OK and problem is with equipment or wiring. If not present, replace thermostat.
Heating will not come onSelect HEAT mode. Increase heating setpoint to 2 or 3 degrees (not more) above room temperature. Simulta- neously press FAN and INCREASE TEMPEFRATURE buttons to defeat timers for 1 cycle. Check for 24 VAC at Y/Y2 terminal (single-speed HP) or Y1/W2 terminal (2-speed HP) within 10 seconds. Increase heating setpoint to 7 or 8 degrees above room temperature. Check for 24VAC at W/W1 terminal (single-speed HP) or Y/Y2 terminal (2-speed HP) within 2 minutes. After 2 minutes check for 24VAC at Y1/W2 terminal (single-speed HP) or WA/V1 terminal (2-speed HP).

Bryant A07048 Thermostat Troubleshooting

Error code Solution
ElIf the Display Module and the Equipment Control Module cannot communicate via two-wire connection, an El will be displayed
E2There is no E2 error message
E3If Thermidistat Control cannot properly read outdoor temperature, and it is needed for proper operation, display will indicate “—” in the outdoor temperature location. If Option 06, 08, 09, 22,23 or 44 is not set to OFE display will indicate “—” in the outdoor temperature location
E4If Thermidistat Control’s internal memory fails, E4 will be displayed
Replace Thermidistat Control
E5If Thermidistat Control cannot properly read humidity, E5 will be displayed
Replace Thermidistat Control
If both Humidify and Dehumidify have been set to OF, the humidity value will be shown as “—” when viewed from the humidity menu, but no E5 will be shown in the display

Bryant 53DFS25 Sl Bry Thermostat Troubleshooting

SYMPTOMCAUSEREMEDY
When not using a common wire the air conditioning equipment tries repeatedly to turn on, but cannot. At times the display dims or dis- appears.There is not enough power available to “power share”.Connect a 270 ohm, 10 watt power resistor at the unit
The air conditioning does not attempt to turn on.The compressor timer lock- out may prevent the air conditioner from turning on, for a period of time.
The display is blank.Lack of proper power.Make sure power is turned on to the HVAC unit and there is 24 vac between R and H2.
If the HVAC unit is cooling only, check there is 24 vac between R and C.
The air conditioning does not attempt to turn on.The cooling set point is set too high.Press the down arrow until the cooling set point is 10 degrees lower than the room temperature.
The heating does not attempt to turn on.The heating set point is set too low.Press the up arrow until the heating set point is 10 degrees higher than the room temperature.
The strip heater turns off well before reaching set point.Heat pump is incorrectly selected “on” in the Advanced Setup.Select heat pump “off” during Advanced Setup programming.

Bryant Ii Tstat 0 16 Thermostat Troubleshooting

SYMPTOMWHAT TO CHECK
No displayOpen Thermidistat Control. Check for 24vac between R and C at screw terminals on mounting base. Reassemble, making sure pins on board engage sockets in mounting base. If display does not appear, replace Thermidistat Control.
“—“ in place of room temperatureThermidistat Control cannot properly read room temperature. Replace Thermidistat Control.
"E3" or “—“ in place of outdoor temperatureThermidistat Control cannot properly read outdoor temperature. Check outdoor sensor and its wiring.
"E4" or "E5"Internal failure. Replace Thermidistat Control.
"E6"System is stuck in defrost. Check wiring and heat pump defrost control board.
"Clean Filter" icon displayedFilter timer has expired. Clean or replace filter and then press VACATION and HOLD/END buttons together to reset.
Cooling or heating will not come onCheck for 24vac at equipment terminals. If not present, check wiring.
Humidify or dehumidify will not come onCheck for 24vac at equipment terminals. If not present, check wiring.

Bryant LEGACY LINE-RNC T1-NAC Thermostat Troubleshooting

Problem Solution
What if there is a green light on in the upper corner of the display area?This thermostat uses a green LED to indicate auxiliary heat and emergency heat operation on the Heat Pump model.
Auxiliary Heat is onThis light turns on automatically when the system determines that it’s too cold outside for your heat pump to heat the house without help. So. it’s getting help from the electric heaters
NOTE: This indicator does not reflect a problem with your system
Emergency Heat is onIf the heal pump is not working properly, you can manually select the emergency heat for extra help in heating. You’ll know there’s a problem if the house can’t seem to get warm when it’s cold outside
You want to avoid using emergency heat, though, because it’s the most expensive option. And. of course, if you suspect a problem with your heal pump, call your heating and cooling dealer immediately

Bryant LEGACY LINE-RNC T1-PAC Thermostat Troubleshooting

Problem Solution
What if AUX HEAT appears on the display? (Heat puinp model only)If auxiliary heat is on, you will see AUX HEAT indicator in the display. When it is on this means the system has determined that it’s too cold outside for your heat pump to heat the house without help, so it’s getting help from the electric heaters. This happens automatically
NOTE: This indicator does not mean there is a problem with your system
What if E-Heat appears on the display?If the heat pump is not working properly, you can manually turn on the emergency heat for extra help in heating. You’ll know there’s a problem if the house can’t seem to get warm when it’s cold outside. You want to avoid using emergency heat, though, because it’s the most expensive option. And, of course, if you suspect a problem with your heat pump, call your heating and cooling dealer immediately

Bryant Legacy Thermostat Troubleshooting

Problem Solution
The battery icon is displayedThe battery icon appears on the display only when the battery starts to lose power. Replace it when one-third of the icon is black. If your thermostat is battery powered and you wait until the icon is just a silhouette with no black bars, you will slowly lose thermostat functions until it doesn’t work at all
“Aux heat on” is displayed (heat pump systems only)Aux heat on is auxiliary heat. It applies only to the heat pump version. If it is on, you will see aux heat on. When it is displayed, it means the system has determined that it’s too cold outside for your heat pump to heat the house without help, so it’s getting help from the electric heaters. This happens automatically
“Em heat” is displayed (heat pump systems only)Em heat is the display term for emergency heat and applies only to the heat pump version. You have to turn on emergency heat manually - it doesn’t happen automatically - so if you see Em heat on the display, it means somebody has turned it on
There is a power outageIf you lose electricity and have batteries installed, the thermostat will continue to display the indoor temperature because it has a battery backup power source. This means that even though your heating and cooling system doesn’t work, you will still be able to monitor your home’s temperature
You get a system error messageHere are the possible system error messages and what they mean: — The room air sensor reports that the room air temperature is above 150° or below -50°.
E4The memory has failed and the thermostat will return to the default factory settings. Call your heating and cooling dealer