Home » Some of Our Service Calls in Greater Montreal » Repair of a Midea wall-mounted heat pump in Blainville
Réparation d’une thermopompe murale Midea à Blainville
Reading time: 4'

Repair of a Midea wall-mounted heat pump in Blainville

When performance drops: a fast and effective AirGreen intervention in Blainville

At AirGreen , we know how much indoor comfort depends on a well-performing and well-maintained HVAC system . Our team recently traveled to Blainville , on Montreal's North Shore , to respond to a service call regarding a Midea wall-mounted heat pump that was no longer heating adequately.

The context: a worried customer before winter

The owner of a modern single-family home contacted us after noticing a noticeable drop in the performance of his heat pump. Despite a set temperature of 22°C, the main room remained cold, especially in the morning. No errors were displayed on the screen, but the indoor unit was blowing lukewarm air and the power consumption seemed abnormally high.

Our technician scheduled a full on-site diagnostic , as per our standard procedure for recent Midea systems.

In-depth diagnosis of the Midea heat pump

Upon our arrival, several observations were made:

  • Device type: Midea wall-mounted heat pump, Mission range model (12,000 BTU).

  • Installation: In a high position, near a staircase leading to an open hall — a configuration typical of modern residences in Blainville.

  • Symptoms: Warm air in heating mode, irregular compressor cycling, no error codes.

After a complete visual inspection, our technicians followed the following steps:

  1. Check the internal filter: Moderate clogging limiting air flow.

  2. Inspection of the internal exchanger: Accumulation of dust and light greasy film.

  3. Pressure measurement on the manometer on the outdoor unit (R-410A): suction pressure too low, potential sign of a partial lack of refrigerant .

  4. Nitrogen leak test : micro-leak detected at a flare fitting.

The intervention: rigor and precision AirGreen

Once the source of the problem was identified, our technicians proceeded to:

  • Replacement of the flare fitting and controlled tightening to the torque recommended by Midea.

  • Complete vacuuming of the refrigeration circuit to -30 inHg for 45 minutes.

  • Recharge R-410A refrigerant gas according to manufacturer's specifications.

  • Complete cleaning of filters and indoor coil.

  • Restart and calibrate the system.

The unit was tested in heating and cooling mode: the pressures stabilized, the blowing temperature reached 41°C, and the compressor operation regularized.

Result: comfort regained and performance restored

The customer immediately noticed a difference:

  • The temperature rise was much faster.

  • The operating noise had reduced.

  • Electricity consumption decreased when monitoring the meter.

Our intervention report also mentioned some preventive recommendations :

  • Clean the filters every 2 months.

  • Schedule an annual AirGreen maintenance before the heating season.

  • Avoid blocking air circulation around the wall unit.

Why choose AirGreen for your Midea heat pump repairs?

At AirGreen, every service is handled with the same level of care, whether it's a simple thermostat failure or a faulty compressor. Our certified technicians are skilled in servicing and repairing all major brands: Midea, Gree, Fujitsu, Sharp, Goodman, Bosch, Lennox, Zephyr, Trane, and many more.

We intervene quickly in Montreal, Laval, Longueuil, on the North Shore and the South Shore , ensuring:

  • Accurate and transparent diagnosis .

  • Original parts certified by manufacturers.

  • Warranty on labor and replaced parts.

  • Personalized post-intervention follow-up .

AirGreen expertise at your service, throughout Greater Montreal

Thanks to our offices strategically located in Montreal and Laval, we quickly serve the entire metropolitan area, including Blainville, Sainte-Thérèse, Boisbriand, Brossard, Longueuil, and Laval .
Our goal: to offer HVAC repair service as efficient as our installations.

Every customer benefits from clear, honest and professional service, with no hidden costs, with measurable results: immediate comfort, optimized energy efficiency and lasting peace of mind.

At AirGreen, reliability is our signature

This Midea wall-mounted heat pump repair in Blainville perfectly illustrates our approach: fast, precise and long-lasting service .
We don't just fix a problem - we ensure every customer has a healthy and stable indoor climate, winter and summer.