Does your heat pump frost up in winter, even when it's not so cold? It consumes more electricity than before and heats less well? The outdoor unit makes more noise and the indoor unit smells funny?
The problem is that your heat pump - outdoor AND indoor unit - needs professional cleaning to restore its original efficiency.
Why do heat pumps get dirty so quickly?
Intensive year-round operation
Unlike an ordinary air conditioner, a heat pump works 12 months a year. It collects the dirt of the four seasons: spring pollen, summer dust, autumn leaves, winter road salt.
Defrost cycle traps contaminants
In winter, your heat pump freezes and thaws several times a day. This process literally imprisons the dirt in the ice, then redeposit it on the coils when it melts.
Double interior/exterior system
Each unit accumulates its own types of contaminants.
L'outdoor unit picks up anything that flies outside.
L'indoor unit constantly filters the air in your home.
Types of heat pumps we clean
Residential air-to-air heat pumps
Mitsubishi ElectricMSZ, MXZ series (wall-mounted and central)
DaikinFTXS, CTXS, FVXS residential ranges
FujitsuHalcyon wall and floor models
LGMulti-zone and single LMU series
CarrierComfort systems with heat pumps
LennoxResidential and light commercial units
Central and commercial heat pumps
TranePackaged systems and commercial splits
YorkHigh-capacity units for large buildings
Lennox: Commercial modular systems
CarrierInstitutional facilities
Johnson Controls: Building integrated systems
Specialized and hybrid systems
Geothermal heat pumpsUnderground interchanges
Variable flow systemsVRF/VRV multi-zones
Heat pumps with auxiliary heatingIntegrated electrical resistors
Units with air purification: Filters HEPA and built-in UV
Connected systemsWiFi control and home automation
Problems specific to heat pumps in Quebec
Challenges of extreme continental climate
Variations -30°C to +35°C: Enormous thermal stress on components
Frequent freeze/thaw cyclesExpansion/contraction that creates cracks
Highly variable humidity90% in summer, 15% in winter
Various precipitationsRain, snow, hail, freezing rain
Quebec seasonal contaminants
Massive spring pollenMaple and birch trees that foul coils
Construction dust in summer: Construction sites and gravel roads
Autumn leaves and debris: Obstructions external fans
Winter road saltAccelerated corrosion of metal components
Poplar cuddly toysThick accumulation on coils
Our 11-step cleaning process
1. Pre-cleaning performance evaluation
Heating testsEfficiency at different outside temperatures
Cooling testsSummer cooling performance
Consumption measuresActual amperage and power
Coolant analysis: High and low pressure, overheating
2. Safe shutdown of complete system
Main power failureDedicated heat pump circuit breaker
Unit insulation: Accidental start prevention
Waiting for stabilizationRefrigerant pressure equalization
Component protectionSensitive electronic coverage
3. Intensive cleaning of outdoor unit
Dismantling access panelsAll surfaces for full access
Condenser coil cleaning: Eliminate build-up between fins
Fan degreasingMotor, blades, guard
Base bin cleaning: Drainage and disinfection
Component verificationContactors, circuit breakers, wiring
4. Complete cleaning of indoor unit
Housing disassemblyAccess to evaporator coils
Cleaning interior coilsMore delicate than those on the outside
Fan decontamination: Turbine and internal motor
Condensation tank cleaningCritical zone for mold
Antimicrobial treatmentInternal surfaces and drain
5. Filter system cleaning
Standard filters: Replacement with high-efficiency equivalents
Washable filtersProfessional cleaning with antimicrobials
HEPA filtersIntegrity check and replacement if necessary
Pre-filtersOften neglected but critical to longevity
6. Checking and cleaning refrigeration lines
Visual inspectionInsulation, supports, connections
External cleaning: Removing contamination from insulation
Sealing check: Leak test with specialized detector
Thermal insulationRepair or replacement if damaged
7. Cleaning electrical components
Control panel: Dusting without damaging circuits
Contactors and relaysCleaning contacts and checking operation
Wiring and connections: Terminal block inspection and cleaning
Sensors and probesTemperature, pressure, flow
8. Specialized antimicrobial treatment
Heat pump-safe products: Compatible with refrigerants and materials
Differentiated applicationDepending on surfaces and components
Optimized contact timeEfficiency without damage to materials
Drain disinfection: Preventing biofilm development
9. Cleaning accessories and peripherals
ThermostatsCalibration and sensor cleaning
Remote controlsDisinfection and functional check
Grilles and diffusers: If connected to central system
WiFi accessories: Cleaning communication modules
10. Leak tests and pressures
System pressure test: Checking the integrity of the refrigerant circuit
Refrigerant level controlAdjustment if necessary
Vacuum testIf working on a closed circuit
Electrical insulation check: Motor and compressor safety
11. Post-cleaning performance tests
Complete heating cyclesAll operating conditions
Cooling tests: Performance air conditioning
Efficiency measuresActual COP (coefficient of performance)
Defrost testsAutomatic operation in winter
Final calibrationOptimization according to installation conditions
Specialized products for heat pumps
Compatible refrigerant cleaners
Coil Cleaner Nu-CalgonSpecially formulated for heat pump coils
Simple Green Pro HDPowerful yet safe electronic degreaser
BrightWell Evap: Residue-free evaporator cleaner
Frost King Coil CleanerFor frequent frost/thaw conditions
Closed-system antimicrobials
Benefect Decon 30Natural disinfectant for all materials
Concrobium Mold ControlLong-lasting antimicrobial without bleach
Pan-SafeEspecially for condensate pans
Microban QGCDurable antimicrobial coating
High-performance lubricants
Synthetic Motor OilFor external fan motors
Sealed bearings: Long-lasting grease for extreme conditions
Electrical Contact Cleaner: Cleaning damage-free connections
Anti-corrosion penetrantProtection of exposed components
Urgent signs of cleaning required
Winter performance problems
Excessive frost even at -5°C and warmer
Defrost cycles very frequent (every 30 minutes)
Heating loss when temperature drops below -15°C
Power consumption lined for even greater comfort
Abnormal noises during operation or defrosting
Summer performance problems
Insufficient cooling same unit maximum
Cooling time much longer than before
Poorly controlled humidity in the house
Ice formation on internal coils
Excessive condensation or water leaks
Visual signs of clogging
Outdoor coils visibly obstructed by debris
Indoor unit which gives off odours on start-up
Black filters after just a few weeks
Plant accumulation around outdoor unit
Visible corrosion on metal components
Seasonal maintenance for heat pumps
Winter preparation (October-November)
Pre-season cleaningFall debris removal before freeze-up
Defrost system testOptimum automatic operation
Insulation checkHeat loss prevention
Calibration controlsOptimization for cold temperatures
Mid-winter maintenance (January-February)
Post-storm inspectionIce or heavy snow damage
Defrost checkFrequency and efficiency
Consumption controlComparison with previous years
Preventive lubrication: Cold-loaded components
Summer preparation (April-May)
Coil cleaning: Pollen and spring debris removal
Test coolingPerformance before heatwaves
Drainage checkOptimum condensation drainage
Summer calibrationSettings for hot and humid climates
Late summer maintenance (August-September)
Intensive cleaning: Eliminating summer buildup
Transition preparationOptimization for seasonal changes
General inspection: Intensive season wear and tear
Maintenance planningFall maintenance schedule
Cleaning frequency depending on use and conditions
Standard residential use
Every 12-18 months: Optimum preventive maintenance
AnnuallyDusty environment or close to traffic
At 6-9 monthsIntensive use full year
Conditions requiring more frequent cleaning
Near highwaysFine particles and road salt
Industrial zonesMetal and chemical dusts
Sectors under constructionConcrete dust and materials
Near waterHigh humidity for biological development
SmokersNicotine residue on indoor coils
Commercial and institutional use
OfficesEvery 6-12 months depending on occupancy density
Shops: Every 4-8 months, depending on type of activity
HealthEvery 3-6 months according to health protocols
Light industrialDepending on process-specific contaminants
Specialized heat pump warranty
4-month winter/summer performance guarantee
Your heat pump should perform better in both modes after cleaning, summer and winter.
6-month energy-efficiency warranty
Measurable reduction in electricity consumption or free optimization.
90-day anti-icing warranty
Removal of excessive winter frost or free treatment of residual causes.
Bi-seasonal certification
Documentation of heating AND cooling performance after cleaning.
Heat pump savings vs. other systems
Maximized efficiency through cleaning
Clean heat pump can be 300-400% more efficient than a standard electric heater. Cleaning maintains this exceptional efficiency.
Specialized life extension
Cleaning can add 8-12 years lifetime. Avoid replacement of 8000-15000$ for additional decade.
Prevention of specific costly repairs
Compressor burnt out: 2000-4000$ replacement
Perforated coils800-1500$ repair
Fan motors300-800$ each
Electronic boards400-1200$ depending on model
Maximize the exceptional efficiency of your heat pump
Your heat pump is one of the most efficient heating/cooling systems around. Professional cleaning can keep it running at peak performance year after year.
Free winter/summer performance evaluation
Call now: 514-214-7492
Online: https://vortexair.ca
E-mail us: info@vortexair.ca
Service 7 days a week • Heat Pump Specialists • 4-month performance warranty
Ventilation Vortex Air - Quebec climate heat pump experts for 10+ years
Over 400 heat pumps cleaned - All makes - Performance guaranteed
FAQ — Heat Pump Cleaning
How do I know if my heat pump really needs to be professionally cleaned?
Honestly, you can tell pretty quickly when you’re out in the field. When a heat pump starts to ice up even at -5 °C, when your electricity bill goes up for no apparent reason, or when the air coming out isn’t as warm as it used to be, it’s rarely a “machine malfunction.” In 8 out of 10 cases, it’s just a dirty heat pump. We’ve seen units that are practically brand-new lose 30 to 40 % in efficiency after two winters without a thorough cleaning.
Why does frost always return in the winter, even after the automatic defrost cycle?
Defrosting removes ice, not dirt. The problem is that dust, pollen, and road salt get stuck in the coils. With each freeze-thaw cycle, they become even more compacted. As a result, the heat pump freezes up faster, defrosts more often, and works harder than necessary. This is very common in Quebec, especially near roads and in densely populated residential neighborhoods.
Is it enough to clean just the outdoor unit?
No, and that’s a mistake we see all too often. The indoor unit is often in worse condition than the outdoor unit. It draws in air from the house year-round—dust, pet hair, moisture, and sometimes even mold. Cleaning just the outside is like washing the tires without cleaning the engine. Performance never fully returns.
How often should a heat pump be cleaned in Quebec?
Under normal conditions, we recommend a thorough professional cleaning every 12 to 18 months. However, if the heat pump is working hard year-round, is located near a busy road, or is in a home with pets, this interval is often reduced to 6–9 months. We always tailor our recommendations to the actual environment, not to a one-size-fits-all rule.
Is it dangerous to clean your heat pump yourself?
A surface cleaning (filters, visible debris) is fine. But opening the unit, touching the coils, or using the wrong products—that’s when it gets risky. We’ve seen crushed fins, damaged circuit boards, and even refrigerant leaks after botched DIY cleanings. The cost of repairs can quickly exceed the price of professional maintenance.
Is it true that cleaning can lower your electricity bill?
Yes, and not just in theory. After cleaning, we often see an actual decrease in amperage and improved heating capacity. In some installations, customers notice a difference as early as the first month. A dirty heat pump puts unnecessary strain on the compressor, and Hydro Québec charges you for that.
Do those strange smells really come from the heat pump?
Very often, yes. Condensation pans and indoor coils are ideal breeding grounds for bacteria and mold. We’ve cleaned units that had smelled musty or like “wet socks” for years. After a thorough antimicrobial treatment, the odor disappears as soon as the unit is turned on for the first time.
Can cleaning prevent costly repairs?
Absolutely. A compressor that has to work harder due to poor heat exchange will eventually fail. The same goes for fan motors and circuit boards exposed to moisture and dust. We’ve seen customers avoid having to replace 3,000 $ units—or even 10,000 $ units—simply by properly maintaining their system.
Are all brands cleaned the same way?
Not at all. A Mitsubishi wall-mounted unit isn’t handled the same way as a Lennox central unit or a Daikin multi-zone system. Each brand has its own specific characteristics: access points, delicate coils, sensitive sensors. A technician who knows heat pumps knows where to touch—and, more importantly, where not to touch.
Does cleaning really help when the heater is on during Quebec winters?
Yes, especially when it’s very cold. A clean heat pump exchanges heat more efficiently, even at -20 °C. We’ve seen this many times: after cleaning, defrost cycles become less frequent and the house maintains a more stable temperature. That’s where cleaning makes all the difference.
What happens if you never clean your heat pump?
At first, it works “properly.” Then it starts using more fuel, heating less effectively, and making more noise… until one day a major component fails. It happens gradually, so many people get used to it without even realizing it. But in the long run, its lifespan can be cut by nearly half.
Is professional cleaning really worth the investment?
Based on our experience in the field, yes, without a doubt. When you compare the cost of maintenance to a higher electricity bill, poor performance, or a major repair, the math is easy. A good cleaning is like giving your heat pump a new lease on life.
