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Réparation d’un climatiseur mural Midea à Sainte-Julie
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Repair of a Midea wall-mounted air conditioner in Sainte-Julie

A revealing service call: abnormal air temperature at the indoor unit outlet

At AirGreen , we regularly receive calls from customers on the South Shore reporting a lack of performance from their wall-mounted air conditioner . This time, our team intervened in Sainte-Julie to diagnose a Midea unit whose blowing temperature seemed insufficiently cold despite a functional compressor.

On site, our technician took an initial reading using an infrared thermometer , confirming an air outlet temperature of 13.7°C . This reading clearly indicated performance below expectations for a well-maintained unit, which should normally provide air between 7°C and 10°C in air conditioning mode.

Technical diagnosis: lack of refrigerant confirmed

After opening the hood of the indoor unit, our experts carried out a complete inspection of the refrigeration circuit . Signs of a lack of R-32 refrigerant quickly became apparent:

  • Suction pressure slightly lower than standard;

  • Light frost on the return pipe;

  • Warm ambient air at the coil outlet.

Thanks to our leak detection tools, we located a micro-leak on the flare connection of the outdoor unit , a classic problem on old installations or those subject to strong thermal variations.

Repair steps: rigor and precision signed AirGreen

  1. Recovery of remaining refrigerant to meet environmental standards.

  2. Flare replacement and complete cleaning of the lines with dry nitrogen.

  3. Pressure leak test for 30 minutes to ensure seal strength.

  4. Recharge the system to the nearest gram according to Midea manufacturer's specifications.

  5. Final performance measurement : blowing temperature stabilized at 7.9°C , a sign of optimal performance restored.

Each step was recorded to ensure complete traceability of the intervention , in accordance with our quality protocols.

Result: restored comfort and optimized energy efficiency

After the repair, the customer immediately noticed the difference:

  • The room was cool again in less than 15 minutes;

  • The device operated at a stable speed without overconsumption;

  • Blowing noise has reduced, indicating better airflow balance.

We also took advantage of the intervention to carry out:

  • A complete cleaning of the filter ;

  • Disinfection of the evaporator with dry steam;

  • A condensate check to prevent future blockages.

AirGreen Tips: Preventing Outages Before Summer

To extend the life of your wall-mounted air conditioner , we recommend:

  • Annual maintenance before each hot season;

  • Checking refrigeration connections and wiring;

  • Regular cleaning of filters (every 4 to 6 weeks);

  • Control of blowing temperatures : between 7°C and 10°C, efficiency is optimal.

Our team serves all of Greater Montreal , including Montreal, Laval, Longueuil, the North Shore and the South Shore , with fast, certified and always transparent interventions.

When to call AirGreen?

  • Your air conditioner blows lukewarm air despite a running compressor;

  • You notice frost on the pipes;

  • A refrigerant leak or abnormal noise occurs;

  • Your Midea unit seems to be performing less well than before.

In all these cases, our qualified technicians intervene quickly, with original parts and expertise recognized throughout the residential and commercial sectors of Greater Montreal.

AirGreen: local HVAC expertise

Every HVAC repair we perform is a commitment to performance, reliability, and lasting comfort . In Sainte-Julie and elsewhere, we combine advanced diagnostic technology , ongoing training , and human service to restore every Midea, Fujitsu, Gree, or Sharp appliance to full efficiency.