A spring service call for a broken heat pump after winter
At AirGreen , the first weeks of spring are often synonymous with difficult restarts for wall-mounted heat pump systems . After several months of inactivity, some units refuse to restart properly. This is exactly what happened to this Midea heat pump installed on a single-family residence in Repentigny , on the North Shore of Montreal .
The customer contacted us after noticing that his heat pump was no longer heating and the outdoor fan was not starting , despite several attempts to restart it from the control panel.
Diagnosis: a blocked fan and an electronic card involved
Upon arrival on site, our technician first performed a complete visual inspection of the Midea outdoor unit , installed on a solid wall bracket, a few centimeters above the ground to avoid snow accumulation.
The housing, well protected by the house's white vinyl covering, was in good general condition. However, when manually testing the fan's rotation, we noticed abnormal mechanical resistance , accompanied by a slight squeaking noise.
After opening the hood, the diagnosis became clearer:
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Accumulation of debris (dry leaves, dust, small branches) around the motor shaft.
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Slightly oxidized electronic board , probably due to winter condensation.
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Fan blocked , preventing the compressor from operating properly.
Using our digital diagnostic tools, we confirmed a communication error between the main board and the fan motor , a common fault on Midea models after a long period of humidity.
AirGreen intervention: cleaning, replacement of parts and electronic recalibration
Our team then carried out a complete repair in three stages:
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Clean the motor and fan with compressed air and a fine brush to remove debris.
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Preventive replacement of the fan motor , as friction could damage the bearings in the short term.
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Refurbishment of electrical connectors and reset of the electronic board after a stable voltage test.
Once these operations were completed, we restarted the heat pump: the fan started silently, and the compressor returned to a stable heating cycle .
To verify performance, we measured:
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A blowing temperature of 38°C inside after 10 minutes of operation.
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Stable power consumption , confirming that the control board was correctly regulating the inverter compressor.
Prevention and recommendations to avoid spring breakdowns
Midea wall-mounted heat pump failures in the spring are often linked to debris buildup in the fan blades or oxidation of electronic components caused by condensation. To avoid this type of incident, our technicians recommend:
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Have the outdoor unit cleaned every fall before the snow.
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Inspect electrical connections at spring restart.
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Schedule annual AirGreen maintenance , including a complete check of the drain, coil and electronic components.
This type of maintenance not only helps prevent costly breakdowns, but also helps maintain optimal energy efficiency throughout the year.
Result: a Midea heat pump ready for the season and a reassured customer
After our performance tests and restart, the Repentigny customer has regained comfort in his home. His wall-mounted Midea heat pump is now operating at full capacity, without noise or vibration.
Before leaving the premises, our technician took the time to explain to the customer how to monitor for signs of fan blockage and use the “Auto Clean” mode built into some recent Midea models.
At AirGreen , we know that every HVAC system repair is an opportunity to strengthen the reliability and durability of your system. Our mission: to ensure our customers on the North Shore, Montreal, Laval, and the South Shore enjoy consistent comfort, no matter the season.
In summary:
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Equipment type : Midea wall-mounted heat pump
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Problem : Blocked fan and oxidized electronic board
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Location : Repentigny, North Shore of Montreal
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Solution : Cleaning, replacing the motor, recalibrating the board
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Result : Complete restart, performance restored and comfort restored