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Carrier AC troubleshooting - PartsAPS

carrier ac troubleshooting

Carrier central air conditioning unit is designed with multiple components. So, there will be more chances to get your unit into trouble. This Carrier AC unit troubleshooting assists you in determining what is wrong with different components. Also, know whether the issue is a DIY fix or require professional repair. We provided some tips that will help to fix Carrier air conditioner problems when do-it-yourself.

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Carrier Air Conditioner Troubleshooting Guide

Go through our Carrier AC unit troubleshooting blog and solve your basic problems.

Check Thermostat

Carrier thermostats are available in various models including basic, programmable, WIFI thermostats, etc. Basic models just control heating & cooling temperatures and responsible for fan operation. Carrier programmable thermostats are set to change the temperatures automatically throughout the day for better comfort when you are home, at work, or asleep at night.

WI-FI versions can control from a mobile or computer anywhere you have access to the internet. However, there are many ways to change the thermostat settings that are caused to your air conditioning not working properly. Now, you can see a few symptoms in your thermostat.

  • Sometimes warm air blows from vents and cold air blows at other times.
  • Higher temperature reading than expected on the thermostat.
  • No air blowing from the vents.

If you observe any of the above symptoms, then you should check and troubleshoot the thermostat.

  • Check for the thermostat set to heating instead of cooling mode and adjust it to cool, if it is. Or else, change it to the auto mode so that it will change between heating and cooling as temperature changes automatically.
  • See the fan set to auto, on or off positions. If it is in "ON" mode, the fan will run constantly even the system is not cooling air. So, it results in blowing warmer air from the vents when the unit isn't operating. Make sure to change the position of the fan to "auto" to resolve the issue.
  • Check for the thermostat setting is at a higher temperature.
  • If it is a programmable thermostat, once review your comfort schedule in the manual for any issues. Moreover, your programmed settings should match the times and temperatures.

Air Filter is Dirty

The second step in Carrier air conditioner troubleshooting is checking for the dirty air filter. Your Carrier AC unit is more than the outdoor unit placing by the side of your home. Most ACs include an indoor air handler unit generally a fan coil or furnace. The air filter is included in the indoor unit and it will trap dirt and other airborne particles.

So, maintenance is a key point to make your indoor air filtration effective and proper cooling system operation. If you neglect the cleaning, it could cause to clogged filter and blocked airflow. However, blocked airflow or clogged air filters lead to discomfort, loss of efficiency, and system failure. If your air filter is dirty, then you can find the symptoms below.

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  • Airflow from the cooling vents or registers seems to be less than usual.
  • The air temperature is warmer than normal.
  • The unit operates for a short period before shutting down and restarting.

Although, before checking the air filter, you should verify the thermostat is set for cooling and the correct temperature setting. If there no problem with the thermostat, then remove and clean the air filter as per the instructions given in the manual. If your problem is not resolved with the cleaning or replacing of the air filter, contact an authorized person.

Refrigerant Level is Low

The refrigerant is a chemical that is used to help cool your home. This chemical pumps through copper tubing, the indoor evaporator coil, and the outdoor condensing coil continuously as a loop. The refrigerant pulls heat from your house and leaves it outside and keep indoor air cooler, less humid as well as comfortable. You may get the following AC problems when the refrigerant level becomes low.

  • The air conditioner turns ON and then OFF quickly many times in a row.
  • Not having enough cool in your home.
  • AC runs continuously or for longer than a normal cycle.

An HVAC technician will have some tools and they know how to troubleshoot your AC for refrigerant related issues. Before calling the technician, you have to check the thermostat settings as we mentioned above.

Issues with Electrical Panel

When you have lost the power to the air conditioning unit, the house becomes warm and the system is not run. Your AC works on electricity so that it will not get power when there is an issue. Check your electrical panel and see for the tripped circuit breaker and blown fuse that is not in the ON position.

Make sure the outdoor unit of your AC is connected to a 220 or 240V circuit breaker that is near the system. If there is a blown fuse or tripped circuit breaker, then you should reset or replace it with a new one. Still, the circuit breaker trips even after replacement, call an HVAC technician to solve electrical issues.

Evaporator Coil is Frozen

The evaporator coil is located as part of an air handler unit. If the indoor unit is a furnace, the coil is located where the outgoing airflows. For the fan coil, the evaporator coil is mounted inside the fan coil cabinet. If you notice any of the below issues, then consider that it's a frozen evaporator.

  • Inadequate cooling.
  • Higher energy bills.
  • Frost forming on the outdoor unit or exterior refrigerant.
  • Frost or ice forming on the copper refrigerant lines coming from your evaporator coil cabinet.
  • Excessive condensate drainage near the indoor unit.

Excessive buildup of dust, dirt, or debris on the evaporator coil or condensing unit will cause these issues. So, you have to clean them regularly. If the frozen evaporator operates for a long time, then there is a chance of serious damages to the whole unit. Hence, troubleshoot the evaporator coil by checking the instructions in the Carrier's manual.

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Summing Up:-

We hope you learn how to diagnose some Carrier AC problems and how to troubleshoot them. If you can't resolve the issues with the above-provided Carrier AC troubleshooting guide, be sure to call an authorized technician. If you want to replace any component of your Carrier air conditioning unit, you can buy new replacement parts from here. PartsAPS sells OEM Carrier AC parts at market price. Stay in touch with us to get more Carrier HVAC troubleshooting guides.

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Haritha is a Content Writer at PartsAPS. She has a great understanding of today's marketing strategies that yield strong results and always happy to create valuable content & share her thoughts.

She was good at writing content for E-Commerce websites related to Restaurant Equipment Parts, Appliance Parts, Food Service Parts, HVAC Parts, etc.

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