Heat Pump Coil Leak Repairs in Greater Vancouver — Expert

Heat Pump Coil Leak Repair Across Greater Vancouver

A refrigerant leak from a coil is one of the most common reasons a heat pump stops heating or cooling properly. Because refrigerant runs in a sealed loop, a low charge always means a leak somewhere in the system — most often in the indoor evaporator coil or the outdoor condenser coil. ROMA Heating & Cooling has diagnosed and repaired heat pump coil leaks across Greater Vancouver since 1999, and our gas-licensed, refrigerant-certified technicians find the actual leak rather than simply topping up the charge and sending you a bill.

Signs Your Heat Pump Has a Coil Leak

Coil leaks usually start small and get worse over weeks. Watch for these symptoms:

• Weak heating or cooling — the system runs but air at the registers is barely warm in winter or barely cool in summer.
• Longer or constant run times — the heat pump struggles to reach the thermostat setpoint and rarely shuts off.
• Ice or frost on the coils — low refrigerant drops coil temperature below freezing, so ice forms on the indoor coil or the outdoor unit.
• Hissing or bubbling noises — escaping refrigerant can make a faint hiss; a larger leak can gurgle.
• Rising energy bills — a system low on charge works harder and uses more electricity for less comfort.
• Oily residue — refrigerant carries compressor oil, so an oily film near a joint or coil often marks the leak point.

What Causes Heat Pump Coils to Leak

Knowing the cause helps us decide whether a repair will last. The usual culprits are:

• Formicary corrosion — airborne acids from cleaning products, carpets, and building materials attack thin copper tubing and create clusters of microscopic pinholes. This is the leading cause of indoor-coil leaks in the Lower Mainland’s airtight, humid homes.
• Vibration fatigue — years of compressor vibration can crack brazed joints and tubing where they flex.
• Physical damage — bent or punctured fins on an outdoor unit from yard tools, pressure washing, or debris.
• Factory or installation defects — a weak braze or rubbed line set that fails after installation.
• Age and wear — after 10-15 years of thermal cycling, coils simply fatigue, especially older units.

Symptom vs Likely Cause

How ROMA Repairs a Heat Pump Coil Leak

We follow a proper, code-compliant process so the repair actually lasts:

1. Confirm the leak — we check the charge with gauges, then locate the leak using electronic detectors, UV dye, or a nitrogen pressure test. We never just add refrigerant and hope.
2. Recover the refrigerant — we recover the remaining charge into a certified recovery machine; venting refrigerant is illegal and harmful.
3. Repair or replace the coil — small accessible leaks can be re-brazed; a coil riddled with formicary pinholes is replaced, using an OEM or matched coil.
4. Evacuate and pressure-test — we pull a deep vacuum to remove moisture and air, then verify the system holds pressure.
5. Recharge by weight — we charge to the manufacturer’s exact specification and verify superheat/subcooling for correct operation.
6. Verify performance — we confirm proper heating and cooling output and that the coil is leak-free before we leave.

Repair or Replace? An Honest Assessment

Not every coil leak is worth chasing. We weigh the unit’s age, warranty coverage, the refrigerant type, and which coil is affected. A pinhole on a newer unit still under warranty is usually a straightforward repair. But a corroded coil on an older system — particularly one still running phased-out R-22, which is now scarce and expensive — often means replacement is the smarter long-term choice. We lay out the numbers so you can decide with confidence, and we never push a replacement you do not need.

Can Coil Leaks Be Prevented?

You cannot stop every leak, but good habits meaningfully extend coil life and catch small leaks before they strand you without heating or cooling:

• Book annual maintenance — a yearly service checks refrigerant charge, inspects coils for early corrosion, and catches a slow leak while it is still a cheap repair.
• Keep the outdoor unit clear — leaves, grass clippings, and debris trap moisture against the coil; keep at least half a metre of clearance and never strike the fins with tools.
• Skip the pressure washer — high-pressure water bends fins and can puncture tubing; rinse gently with a garden hose instead.
• Change indoor filters regularly — restricted airflow lets the indoor coil run colder and ice up, which stresses the tubing over time.
• Improve indoor air quality — reducing harsh airborne chemicals and ventilating well helps slow the formicary corrosion that causes most indoor-coil pinholes in tight Lower Mainland homes.

Heat Pump Brands and Coils We Service

Our technicians repair coil leaks across the ducted and ductless heat pump brands installed throughout Greater Vancouver, including Daikin, Mitsubishi Electric, Fujitsu, Carrier, Lennox, Goodman, Bosch, LG, and Gree. Whether the leak is in an indoor evaporator (A-coil or cassette), an outdoor condenser, or the line set connecting them, we carry leak-detection equipment, recovery machines, and common parts so most diagnoses and many repairs are completed in a single visit. We work on both R-410A systems and older R-22 units, and we will tell you honestly when sourcing scarce R-22 makes replacement the better value.

Same-Day Heat Pump Service Across Metro Vancouver

A heat pump that has lost its charge during a cold snap or a summer heat wave can leave your home uncomfortable fast. ROMA offers same-day and after-hours emergency heat pump service throughout Metro Vancouver — including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Delta, and Langley. Call (604) 704-0300 and a refrigerant-certified technician will get your heating and cooling restored as quickly as possible.

What Our Customers Say

“Nelson arrived at our house one day after requesting an appointment, and solved our heat pump issue within half an hour during a heat wave.”

— Gordon Francis, Google review (★★★★★)

“Roma installed a heat pump for me. I’m so happy with the service — thank you Shawn and Bob.”

— Babak Heydari, Google review (★★★★★)

Frequently Asked Questions

How do I know if my heat pump coil is leaking refrigerant?

Tell-tale signs are weak heating or cooling, longer run times, ice forming on the indoor or outdoor coil, a hissing or bubbling sound near the unit, and rising energy bills. A licensed technician confirms a leak with electronic leak detection, UV dye, or a nitrogen pressure test rather than by ‘topping up’ refrigerant.

Can a leaking heat pump coil just be recharged with refrigerant?

No. Refrigerant is sealed in a closed loop, so if the charge is low there is a leak. Adding refrigerant without finding and repairing the leak only masks the problem for a few weeks or months, wastes refrigerant, and can damage the compressor. We locate and seal the leak first, then recharge to the manufacturer’s spec by weight.

Is it better to repair the coil or replace the heat pump?

It depends on the unit’s age, warranty status, and which coil is leaking. A pinhole in an accessible joint on a newer unit under warranty is usually worth repairing; a corroded indoor or outdoor coil on a 12-15 year old system, especially one using phased-out R-22, often points to replacement. We give an honest repair-versus-replace comparison after diagnosis.

Why do heat pump coils leak in the first place?

The most common cause in Greater Vancouver is formicary (ant-nest) corrosion, where airborne acids attack copper tubing and create microscopic pinholes. Other causes are vibration fatigue at brazed joints, factory defects, physical damage to the outdoor coil fins, and age-related wear after a decade or more of expansion and contraction.

Is a refrigerant leak from my heat pump dangerous?

Modern refrigerants like R-410A are non-toxic and non-flammable in normal home conditions, but a leak still matters: it reduces efficiency, can ice up and overheat the compressor, and releasing refrigerant is environmentally harmful and illegal to vent. Leaks must be recovered and repaired by a technician certified to handle refrigerant.

Related Heating Services

• Heat Pump Not Heating
• Heat Pump Not Cooling
• Heat Pump Maintenance
• Heat Pump Leak Detection & Repair
• Emergency HVAC Repair

Call ROMA Heating & Cooling Today

For fast, professional diagnosis and repair anywhere in Greater Vancouver, call (604) 704-0300 or email info@romaheating.ca. Same-day and after-hours service, gas-licensed and insured, serving the Lower Mainland since 1999.