A thorough cleaning to restore full efficiency to a clogged central processing unit
When a central heat pump starts to show signs of wear and tear — unusual noise, decreased efficiency, or excessive energy consumption — a simple cleaning can often make all the difference.
At AirGreen , we regularly service this type of equipment in residences on the South Shore of Montreal , where leaves, dust and natural debris accumulate over the seasons.
That day, our team went to Sainte-Julie to restore the performance of a Waller Wilson brand outdoor central unit , slightly dirty due to a particularly windy spring.
Symptoms observed before our intervention
The client contacted us after noticing:
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A decrease in cooling capacity inside the house;
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A louder than usual fan noise coming from the outdoor unit;
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And an unusual increase in the electricity bill .
On initial inspection, we found a significant accumulation of dust, pollen, and plant debris on the heat exchanger fins, blocking airflow.
This type of fouling forces the compressor to work harder, which reduces energy efficiency and accelerates component wear.
Our AirGreen professional cleaning method
1. Site preparation
We first secured the area around the heat pump: clearing nearby branches, checking the stability of the base, then cutting off the power at the source to work safely.
A quick check of the refrigeration connections and electrical wiring was carried out before cleaning.
2. Partial dismantling and inspection
The top cover was removed to access the fan impeller and the inner face of the heat exchanger.
We took advantage of this step to check:
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The condition of the fins (some slightly bent);
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The fan , partially obstructed by leaves;
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And the condensation tray , which contained some accumulated debris.
3. Cleaning the heat exchanger and the fan
Using a biodegradable cleaning product formulated specifically for aluminum surfaces, we evenly sprayed the entire surface of the exchanger.
After a few minutes of action, a rinse with clean water and low pressure made it possible to detach the ingrained dust without damaging the fins.
The fan was then disassembled, dusted off, and its blades cleaned with a damp microfiber cloth.
4. Clearing of the tank and pipes
The condensation tray was emptied and rinsed with clean water, then disinfected using a mild solution based on natural antibacterial agents.
We also checked the condensation drain , which is often neglected, to prevent any accumulation of stagnant water that could promote mold growth.
5. Reassembly and final testing
Once all the components were cleaned and dried, we proceeded with the complete reassembly of the unit and the restart of the system .
The tests carried out confirmed an immediate rise in discharge pressure , a sign of a return to optimal air circulation.
Concrete results after cleaning
A few minutes after the system was put back into service, the differences were obvious:
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The outdoor unit operated more quietly ;
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The internal air supply temperature dropped more rapidly;
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And the airflow has become constant again on all the vents in the house.
According to the measurements taken, the overall performance of the system has improved by more than 18% .
A simple cleaning therefore allowed the customer to regain optimal comfort while reducing energy consumption.
Why choose AirGreen for the maintenance of your central heat pump
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Qualified and experienced technicians in residential and commercial HVAC systems;
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Methods in accordance with manufacturers' recommendations ;
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Environmentally friendly products that are safe for use on metal surfaces;
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Rapid and thorough interventions , even in hard-to-reach areas.
Central heat pump cleaning is not a luxury, but an essential preventative measure .
It protects your compressor, optimizes your comfort, and prevents costly breakdowns related to overheating.
AirGreen tips for maintaining your unit between cleanings
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Regularly clear away leaves and branches around the outdoor unit.
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Visually check that the ventilation grilles are not obstructed.
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Have an annual professional service performed before periods of heavy use (spring and autumn).
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Watch for any signs of unusual noise or decreased efficiency , often the first indicator of fouling.
At AirGreen , our mission is simple: to guarantee our customers in Montreal, Laval, Longueuil, the North Shore and the South Shore cleaner air, optimal energy efficiency and lasting comfort.
Each cleaning is carried out with care, precision and respect for your installation — as if it were our own.