An air conditioner that works properly is essential for a comfortable life in a warm, humid climate. Changes in air conditioner performance are a concern, but you must check your thermostat before calling an HVAC expert. There are various reasons why the air conditioner cannot keep up with the normal operation of the thermostat. There may be some issue with the sensor or thermostat itself.

There may also be several other reasons that require little effort to fix or more technical knowledge to ensure the fix is correct. So learning how to troubleshoot these issues can help you avoid unnecessary and costly service calls. For AC tune-up in Dallas, you can contact a professional who will guide you on the repair process.

Reasons Why AC Can't Keep Up With The Thermostat

  • Dirty Evaporator Coil 

The evaporator coil can be covered with dirt and debris. It restricts the cooling process and makes it difficult for the unit to cool the space. 

  • Loss of Refrigerant 

Leaks along the refrigerant line are a serious problem. If the air conditioner lacks refrigerant, it loses its cooling capacity and probably causes a ruined compressor. So it is recommended to contact a technician to avoid costly repairs. 

  • Frozen Thermostat

One of the reasons may be that the thermostat has frozen. Nowadays, most thermostats are intelligent. Also, if there are some issues with the ambient static electricity, there may be a problem with the thermostat’s touch screen. 

  • Overheating Fan Motor or Compressor 

A failed fan motor or compressor can overheat and stop working. Then, after cooling, it will operate normally for a while until it overheats again. When this happens, the problem is intermittent and can become difficult to identify. 

  • The Air Filter is Dirty 

If the air filter is dirty, it will limit the flow of air and can cause various problems. A short cycle is when the air conditioner turns on and off in a very short burst without completing a complete cooling cycle. If the filter is clogged, the AC will not work well, resulting in lesser efficiency.

Some Quick Solutions For This Issue Include

  • Clean Your Air Filters, Vents, and Ducts 

Fortunately, taking care of filters, vents, and ducts helps improve circulation and allows the HVAC system to adapt to thermostat settings easily. 

  • Clean Your Condenser 

Consider spraying a water hose on the outdoor condenser to provide as much cooling power as possible. 

  • Inspect Your Ducts and Repair Any Holes

If you don’t seem to be getting sufficient air out of the register, or if your energy bills continue to rise, consult an HVAC expert to check the condition of your ducts.


There are other reasons why the central air conditioning in hot places can’t keep up with the heat of summer. You can trust the experts for any air conditioning repair and AC service in Dallas, TX. AirTemp AC and Heating has a team of knowledgeable technicians with the skills, experience, and resources to troubleshoot thermostat failures and HVAC issues. Book by phone or online.