A fully functioning air conditioning unit is necessary, especially during the hot summers. If there is a malfunction in the ac unit or the cooling is uneven, it brings down the performance of the air conditioner and requires immediate attention. However, before you hire a technician, it is better to inspect the thermostat first. Some minor thermostat issues can resemble severe problems with HVAC units and can influence the cooling system performance and support.
A thermostat malfunction will not cause any sirens or sparkles flying your way. In most cases, if the issue is with the thermostat, it will accompany slow performance deterioration of the working of the cooling unit. At times the fault in thermostat may even bring a sudden change with the cooling going down and causing you to panic. However, when you feel the worse and anticipate heavy repair works to fix the HVAC unit, it may be a simple thermostat problem that is easy to set.
If you find the air conditioning functioning in small cycles where it runs all the time, you may consider a fault in the thermostat. Or if you feel the room temperature is warmer with the typical cooling setting, it may indicate a system failure. Learning how to deal with these problems properly without delays can help you save money and time in unnecessary and expensive service calls.
The Air Conditioner Stops Working
Check for the thermostat problems. Look out for the thermostat indicator which should show lit. In case the display is not lit it indicates the inability of the thermostat to point the air conditioner to cycle on with the cooling operation. Look out for the main reasons due to which the thermostat is not getting the power supply. Some common causes include batteries with low power, a breaker tripped, or maybe a fuse is blown in the central electrical service board.
If you are sure there are no power issues, turn off the thermostat breaker, and check the inner parts of the thermostat. First examine if there is an increase of dust, grit, tobacco smoke or grime. A thermostat may malfunction if it accumulates substantial debris on its mechanical and electrical parts. You can use a soft brush or use canned air compression to clean the inner components.
Once you clean the inner portion thoroughly, check for other problems. Few things that you can detect yourself includes loose wirings and terminal screws or signs of corrosion on the installations. Refer to the user manual to use the wiring schematic as a replacement model, or you can go for the entire replacement of the thermostat.
Room Heat Never Goes to the Thermostat Configuration
Any buildup of grime and dust will bring inconsistency between the room temperature and the present temperature setting of the cooling unit. Follow the above method to do the cleaning first before you go for other steps.
Your thermostat may shift from its stable level and move off the kilter if the installation is poor or exposed to a good hit. This shift can bring temperatures inconsistency. If the issues are because of the thermostat, it is easy to balance this by placing two carpenter’s level over or underneath the thermostat and adjusting it, so it’s at the resting level.
Another common fault is when the heat anticipator is stuck, and this issue is more prevalent in the mechanical models of the thermostat. Take the cover off and find the anticipator by searching for a small metal arm that rests on a circular dial. Gently exert some pressure on the metal arm in any direction to set it free.
A thermostat that is not in a proper place will bring down the regulation of the temperature, so be careful when placing it in your house. Avoid exposing the unit to unnecessary sunlight or cold environment. If the placement is done far away from the living area, you may want to relocate the thermostat for better results.
Regular Short Cycling or Constant Running
A thermostat that is not sitting at an even level or carrying dirt can result in the short cycling and a non-stop operation that burdens the thermostat and result in energy wastage as well. Follow the above strategies to inspect and fix these two problems first.
One reason can be poor calibration in the anticipator. You can increase the cooling cycle by shifting the anticipator arm in single-notch increments towards the sign for “longer” marking on the circular dial. Allow the A/C to finish the full cycle while you make the adjustments until you observe an improvement in performance.
If you are still not able to get any results with the above troubleshooting strategies, you should consult a qualified HVAC technician and let the experts inspect the matter. Even if you manage to fix the issue, it is better to replace your old thermostat with the latest programmable version to avoid future malfunctions.