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How to Detect Sensor Problems on Your Air Conditioning Unit

A Guide by Air Improve

When it comes to maintaining a comfortable living or working environment, air conditioning units are indispensable, especially during hot summers and chilly winters. As a leading provider of air conditioning installation and repair in Plymouth, Air Improve wants to keep you informed on how to take care of your air conditioning equipment. A particularly significant yet often overlooked aspect is the sensor. Sensor issues can seriously hinder the efficiency of your air conditioning system and should be addressed promptly.

Why Are Sensors Important in Air Conditioning Equipment?

Sensors play a pivotal role in regulating the temperature and ensuring that the system functions as efficiently as possible. Think of them as the thermostat’s eyes and ears. When your sensor starts to fail, you’ll notice that your air conditioning unit either cools too much or not enough, leading to discomfort and potential energy wastage.

Common Signs of Sensor Problems in Air Conditioning Units

Inconsistent Temperatures

One of the first signs of a malfunctioning sensor in your air conditioning Plymouth-based unit is inconsistent temperatures. You’ll find that the system cycles between being too cold or too warm, unable to maintain a constant temperature.


Short-cycling is when the air conditioning unit turns on and off rapidly, failing to complete a full cooling cycle. This could be an indication that your sensor is not correctly reading the room’s temperature, causing the unit to shut off prematurely.

Energy Bills Spiking

A malfunctioning sensor can drastically reduce the efficiency of your air conditioning equipment. You may notice a sudden increase in your energy bills without any changes in your usage pattern.

How to Detect Sensor Issues

Manual Inspection

Start with a manual inspection of the sensor. It is usually located near the evaporator coil. Check to see if it is properly positioned and not knocked out of place.

Use a Multi-meter

If you have the technical know-how, use a multi-meter to test the sensor’s resistance. The reading should change with the temperature. If it doesn’t, it is likely that the sensor is faulty.

Professional Check-up

For those who are not DIY-savvy or if the issue remains unresolved, it’s best to consult an expert in air conditioning installation and repair. With local exhaust ventilation and other specialised tools, professionals can provide a more thorough diagnosis.

Solutions for Sensor Issues


Sometimes, re-positioning the sensor correctly near the evaporator coil can resolve the issue. Make sure it’s not touching the coil but close enough to gauge accurate temperatures.


In more severe cases, you may need to replace the sensor altogether. Given the complexities involved in air conditioning equipment, it is often best to leave this to professionals.

Regular Maintenance

Regular maintenance from a reputable air conditioning UK service provider can help prevent sensor problems in the first place.

The Air Improve Advantage for Air Conditioning in Plymouth

At Air Improve, we not only install air conditioning but also offer comprehensive maintenance services that include sensor checks and local exhaust ventilation solutions. Given the humid weather in Plymouth and the intricacy of air conditioning units, a professional touch is often required for long-lasting performance.

Our team is well-equipped and trained to identify and resolve any sensor-related issues, ensuring that your air conditioning unit performs at its best, saving you both discomfort and money in the long run.

Final Thoughts

Sensor problems in air conditioning equipment can be both a hassle and a drain on resources. Recognising the signs of malfunction and taking quick corrective action can save you a lot of trouble. Whether you’re adept at DIY or prefer professional services for your air conditioning installation and maintenance, understanding sensor issues is crucial for optimal performance.

So if you’re in Plymouth or the Winchester area and find yourself in need of air conditioning repair or installation services, don’t hesitate to contact Air Improve. We’ve got the expertise to keep you cool and comfortable all year round.