If you've been cranking the thermostat up and down, but failing to achieve a comfortable temperature, you may need to reset the thermostat for your
Like any other electronic device, sometimes a digital thermostat needs a reset to get it working properly again. Resets are most often needed after a power outage, as the sudden shutoff can prevent a digital thermostat from sending signals to your HVAC system properly when the power comes back on.
A bad thermostat can be detected when your AC or furnace is not turning on, your HVAC systems are not turning off, the thermostat not responding, your HVAC system is short-cycling, the room temperature not matching the temperature displayed on the thermostat, and the programmed setting resetting themselves.
Inconsistent home temperatures and high energy bills are telltale signs your thermostat may need calibration. Thermostat calibration, as well as boiler maintenance, are essential components of HVAC systems. Properly calibrating your thermostat ensures more precise temperature control and energy efficiency.
Some of the most common thermostat issues include:
The thermostat is broken, not properly level, or dusty. The thermostat needs to be recalibrated. There is loose wiring causing a thermostat issue.
Resetting your Honeywell Thermostat can fix common issues like inaccurate temperature readings, scheduling problems, and unresponsive buttons.
Turn on the heat on the thermostat and increase the temperature. You should hear a sound from both the thermostat and the furnace, and whichever doesn't make a sound has a problem.
If your thermostat is not reading correctly, it might be due to a dirty or faulty sensor. A quick fix could be to gently clean the sensor with canned air to remove any dust buildup. However, if problems persist, replacing the thermostat could be the next step.
They must also be calibrated after an extreme temperature change (e.g., after measuring a hot food first and then a frozen food, or after a thermometer is dropped). All calibrated thermometers should be accurate within 2 degrees (plus or minus 2 degrees).
One of the lesser-known issues is the polar opposite of overheating. Overcooling happens when the engine does not reach the right temperature for its normal function. In this scenario, the thermostat is stuck open and overflows the radiator with coolant, drastically reducing the engine life cycle.
The Lifespan of a Thermostat
On average, most thermostats last about 10 years, depending on the model, usage, and proper maintenance. However, many people decide to replace their unit sooner to take advantage of new energy-saving technologies.
First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.
Many computers, especially older models, have user accessible "reset" buttons that assert the reset line to facilitate a system reboot in a way that cannot be trapped (i.e. prevented) by the operating system, or holding a combination of buttons on some mobile devices.
P0128 is an extension of OBD-II code P0 which indicates a problem with your car's coolant thermostat.
Clean the Thermostat. Sometimes, when the room temperature doesn't match the thermostat setting, the problem could be dirt buildup on its interior parts. A dirt coating around the inner components may create excess heat and cause the thermostat to give the wrong readings.
Checking the calibration of your thermostat is easy and should be done once a year, generally in the fall. To do so, locate your home's thermostat and tape an accurate thermometer on the wall next to it. Wait 15 minutes and check the temperature reading on both devices.
Leave both units in place for another 20 minutes, and check the readings again to see if the readings are the same. If the readings between your thermostat and thermometer are still different, you likely have a malfunctioning thermostat and there may be an issue impacting thermostat accuracy and efficiency.
The following circumstances are common reasons why thermostats need to be reset: There has been a power outage. The batteries have been changed. HVAC filters have been cleaned or replaced.
Issues to Check Before You Worry
Check your HVAC system's air filter. If a filter is clogged, especially one near the cold air return, it can interfere both with your air conditioner's ability to cool your home and your thermostat's ability to read the air temperature. Check the batteries.
Your Thermostat Gives Faulty Readings
If you suspect that your HVAC system is giving faulty temperature readings, then you can use an indoor thermometer to determine the current temperature. If it doesn't match what your thermostat says, then it may be time to replace your thermostat.
Locate the Reset Button: Most Honeywell thermostats have a reset button. It's usually located near the main display or behind a cover panel. Power Off the Thermostat: Turn off the thermostat's power source, usually by flipping the circuit breaker or removing the batteries.