- Blowing warm air
- Making unusual noises
- Leaking refrigerant
- Repeatedly tripping the breaker
- Running without cooling your home.
These problems usually involve electrical, mechanical or refrigerant components that require professional repair.
In Metro Vancouver, many homes use heat pumps instead of traditional central air conditioners. It’s better to know when to call a licensed technician to prevent expensive repairs and help your system last longer.
Heat Pumps vs. Central AC: Why It Matters
Many homeowners use the words air conditioner and heat pump as if they mean the same thing. They both cool your home, but they are not the same system.
This difference matters when something goes wrong.
Across Metro Vancouver, many homes rely on ducted heat pumps or mini-split heat pumps instead of traditional central air conditioners. Heat pumps cool your home in summer and provide heating during winter. Because they do both jobs, they have extra components that standard air conditioners do not have.
For example, a heat pump has a reversing valve that switches between heating and cooling modes. If this part fails, your system may blow warm air even when it is set to cool.
What You Can Check Yourself (Before Calling Anyone)
Not every cooling problem needs a service call. There are a few simple checks you can safely do yourself.
Check the Air Filter
A dirty air filter is one of the most common reasons an AC or heat pump stops cooling properly.
When the filter becomes clogged with dust and debris, airflow becomes restricted. This can lead to weak airflow, frozen coils, longer run times, and higher energy bills.
Remove the filter and inspect it. If it looks grey, dusty, or blocked, replace it with a new one.
During the cooling season, it is a good idea to check your filter every month. Vancouver homeowners may need to replace filters more often during wildfire smoke season because smoke particles can clog filters much faster.
Check the Thermostat
Sometimes the issue is simply an incorrect setting.
Make sure your thermostat is:
- Set to Cool
- Lower than the current room temperature
- Running on fresh batteries if it uses them
If you have a smart thermostat, open the mobile app and check that a schedule has not changed your settings automatically.
If everything looks correct but the house is still warm, the thermostat is probably not the problem.
Check the Circuit Breaker
If your system will not start at all, look at your home’s electrical panel.
- A tripped breaker can stop your AC or heat pump from running.
- You can reset the breaker once.
- If it trips again right away, stop there.
Do not continue resetting it. A breaker that repeatedly trips often points to an electrical fault that needs professional attention.
Check the Outdoor Unit
If your AC won’t turn on, walk outside and look at the outdoor unit. Make sure nothing is blocking airflow around it.
Common obstructions include:
- Leaves
- Grass
- Shrubs
- Garden furniture
- Yard equipment
If the metal fins are dirty, rinse them gently with a garden hose. Do not use a pressure washer because it can bend the fins.
Also, never remove panels or attempt to repair internal parts yourself. Always take professional Air conditioning services.
Check Your Air Vents
Walk through each room in your home. Make sure every supply vent is fully open. Furniture, rugs, curtains, or storage boxes can block airflow without you noticing.
If one room feels warmer than the others, check the vent in that room before assuming there is a major system problem.
Signs You Should Call a Professional Soon (Non-Emergency Issues)
Some AC problems are not emergencies, but they should not be ignored either.
Weak Airflow
If you have already replaced the filter and confirmed all vents are open, but airflow still feels weak, there may be a larger problem.
Possible causes include:
- Dirty evaporator coils
- Blower motor problems
- Refrigerant issues
- Leaking ductwork
Older Vancouver homes often have aging duct systems that develop leaks over time. These leaks reduce airflow and make your cooling system work harder than necessary.
For homes with mini-split heat pumps, weak airflow is often caused by dirty indoor coils that need professional cleaning.
Uneven Cooling Between Rooms
If one room stays warm while the rest of the house feels comfortable, the issue is not always with the AC itself.
It may be caused by:
- Airflow imbalance
- Ductwork issues
- Poor zoning
- Blocked vents
In homes with multi-zone heat pumps, one indoor unit failing to cool while the others work normally could indicate a refrigerant distribution problem or a faulty zone controller.
A professional inspection can identify the exact cause before it becomes more serious.
Your AC Runs Constantly but Never Reaches the Set Temperature
An air conditioner should cycle on and off during normal operation.
If it runs all day without reaching your desired temperature, something is reducing its efficiency.
Possible causes include:
- Low refrigerant
- Dirty coils
- Undersized equipment
- Duct leakage
- Compressor wear
Your BC Hydro Bill Suddenly Increases
A higher electricity bill does not always mean energy prices have changed. Sometimes it is your cooling system using more electricity than it should.
Having the system inspected early can often prevent further damage and reduce future energy costs.
A Musty Smell Comes from the Vents
A mild dusty smell when you first turn on your AC after months of not using it is usually normal.
It should disappear after the system has been running for a short time. However, if the smell stays, there may be mould on the evaporator coil or inside the ductwork.
Signs You Need to Call a Professional Now (Urgent Issues)
Some AC problems need attention as soon as possible. They may not be life threatening, but delaying repairs can cause serious damage to your system and increase repair costs.
AC Is Blowing Warm Air
If your system is running but only blowing warm air, something is preventing it from cooling properly.
The most common causes include:
- Low refrigerant
- A failing compressor
- A heat pump reversing valve that is stuck in heating mode
These are not problems you can fix yourself. They require professional diagnosis and repair.
In Metro Vancouver, this is one of the most common complaints during the first hot days of summer. Many heat pumps work well throughout winter but only show cooling-related problems when temperatures rise.
Ice on the Indoor Unit or Refrigerant Lines
Ice might seem harmless, but it is a warning sign.
If you notice ice forming on the indoor unit or refrigerant lines, switch the system off.
Then change the thermostat to Fan Only for a few hours. This allows the ice to melt naturally.
Check the air filter while you wait.
If the system freezes again after restarting, call an HVAC technician. The problem may be caused by restricted airflow or low refrigerant, both of which require professional repair. Running a frozen system can damage the compressor.
Grinding, Screeching, or Banging Noises
Your AC should never make loud mechanical noises.
Different sounds often point to different problems.
- Grinding may mean worn motor bearings.
- Screeching can indicate compressor or belt problems.
- Banging may mean loose or broken internal parts.
Turn the system off as soon as you hear these noises.
Continuing to run it can cause additional damage and make repairs much more expensive.
The Circuit Breaker Keeps Tripping
Resetting a breaker once is reasonable.
If it trips again immediately, do not keep resetting it.
Repeated breaker trips often indicate:
- Electrical faults
- Capacitor failure
- Compressor problems
- Short circuits
At this point, the safest option is to leave the system off and call a licensed HVAC technician.
Water Is Leaking Inside Your Home
Your cooling system naturally creates condensation, but that water should drain safely outside.
If water starts leaking from the indoor unit, there may be a blocked or disconnected condensate drain.
Ignoring the leak can damage flooring, drywall, ceilings, and nearby furniture. Turn the system off and arrange a same-day service appointment.
Signs It’s an Emergency: Call Immediately
Some problems should never be ignored. If you notice any of the following, stop using your system and contact a professional immediately.
Refrigerant Leak
A refrigerant leak may cause:
- Hissing or bubbling sounds
- Ice on refrigerant lines
- Poor cooling performance
- A chemical smell around the unit
Refrigerant must only be handled by licensed refrigeration mechanics in British Columbia.
Do not try to refill or repair refrigerant lines yourself. Turn the system off and call a professional immediately.
Burning Smell or Smoke
If you smell burning plastic, hot wiring, or see smoke coming from your system, turn it off immediately.
Switch the thermostat off and shut the breaker off if it is safe to do so. Do not restart the system.
If visible smoke is present, contact emergency services before calling an HVAC company.
Repair or Replace? An Honest Guide
Many homeowners wonder whether repairing an older system is worth the cost.
A simple guideline many HVAC professionals use is the 50% rule.
If the repair costs more than half the price of a new system, and your equipment is already well into its expected lifespan, replacement is often the better investment.
Consider Repairing If:
- Your system is under 10 years old.
- The repair is relatively affordable.
- Only one part has failed.
- The system has received regular maintenance.
Consider Replacing If:
- Your system is more than 12 years old.
- It has a failed compressor or another major component.
- Repair costs continue to add up.
- It still uses older R-22 refrigerant.
Homeowners replacing older systems with high-efficiency heat pumps may also qualify for available BC Hydro rebates, depending on eligibility.
BC-Specific Factors That Affect Your AC System
Living in Metro Vancouver creates different challenges than many other parts of Canada.
Heat Waves Put Extra Stress on Cooling Systems
Since the 2021 heat dome, demand for cooling systems has increased across the Lower Mainland.
Many systems installed during that period are now reaching the point where regular maintenance becomes more important.
Wildfire Smoke Affects Indoor Air Quality
Wildfire smoke is now part of many BC summers. Smoke particles collect on filters and indoor coils, reducing airflow and making your system less efficient.
Replacing filters more often during smoke season can help protect your equipment.
Older Homes Can Create Extra Challenges
Many homes in Vancouver, Burnaby, and nearby communities were built before air conditioning became common.
Older ductwork, electrical systems, and home layouts can sometimes make cooling problems more difficult to diagnose.
This is another reason to choose a technician who understands local housing and heat pump systems.
Annual Maintenance Is the Best Way to Avoid Emergency Repairs
The easiest way to reduce unexpected breakdowns is regular maintenance.
A professional tune-up typically includes:
- Checking refrigerant levels
- Cleaning indoor and outdoor coils
- Inspecting electrical connections
- Testing capacitors and contactors
- Flushing the condensate drain
- Inspecting or replacing filters
- Checking thermostat operation
- Testing overall system performance
For most Vancouver homeowners, spring is the best time to schedule maintenance before the cooling season begins.
When to Call Lew Plumbing
If your AC or heat pump is showing any of the warning signs discussed above, it is worth having it inspected before the problem gets worse.
At Lew Plumbing, our licensed technicians repair and service heat pumps, mini-splits, ducted systems, and traditional air conditioners across Vancouver, Burnaby, Coquitlam, New Westminster, North Vancouver, Port Coquitlam, Port Moody, Richmond, and West Vancouver.
Whether you need routine maintenance or urgent repairs, we’ll help you understand the problem and recommend the most practical solution for your home. Call us for inspections.
Frequently Asked Questions
Can I repair my AC myself?
You can safely replace air filters, check thermostat settings, inspect vents, clear debris around the outdoor unit, and reset a tripped breaker once. Repairs involving refrigerant, electrical parts, or internal components should always be left to a licensed professional.
Why is my heat pump blowing warm air?
The most common causes are low refrigerant, dirty coils, compressor problems, or a reversing valve that is not switching properly. A technician should inspect the system to identify the exact cause.
How often should my AC or heat pump be serviced?
Most systems should be professionally serviced once a year. If your home is heavily affected by wildfire smoke, an additional inspection after smoke season can also be beneficial.
Is it worth repairing an older AC?
It depends on the age of the system and the repair cost. Older units with major component failures are often better candidates for replacement, while newer systems usually make more sense to repair.
