My newly installed heat pump is tripping the breaker — what should I check?

A heat pump tripping the breaker indicates an electrical overload or fault that requires immediate attention from a licensed electrical contractor. This is not a DIY troubleshooting situation, as heat pump electrical systems operate at high voltage and amperage that can be dangerous to work on without proper training.

Immediate Safety Steps

First, turn off the heat pump at both the indoor unit and the outdoor disconnect switch. Don't keep resetting the breaker — repeated tripping indicates a genuine electrical problem that could lead to equipment damage or fire risk. In BC, all electrical work on heat pumps must be performed by electricians licensed with Technical Safety BC (TSBC), and the installation should have been inspected before being energized.

Common Causes in Vancouver Installations

Heat pump electrical issues often stem from improper sizing of the electrical supply. Many Vancouver homes, especially older character homes and Vancouver Specials built before 1985, weren't designed for the electrical demands of modern heat pumps. A typical cold-climate heat pump requires a dedicated 40-60 amp circuit, which may exceed what your existing electrical panel can handle safely.

Installation-related problems are also common with new heat pump installations. The outdoor unit may have damaged wiring during installation, loose connections at the disconnect switch, or incorrect wire sizing for the distance between your electrical panel and the outdoor unit. Vancouver's wet climate can also cause moisture infiltration in electrical connections if the installation wasn't properly sealed.

Electrical Panel Considerations

If your home has an older electrical panel (especially Federal Pacific or Zinsco panels common in 1960s-80s Vancouver homes), the breakers themselves may be failing. These panels are known for breaker reliability issues and may not properly protect modern high-draw appliances like heat pumps. Many Vancouver homeowners discover during heat pump installation that their entire electrical service needs upgrading from 100 to 200 amps.

CleanBC Better Homes Rebate Impact

Since many Vancouver heat pump installations are part of CleanBC Better Homes rebate programs (offering up to $16,000 for income-qualified households), ensure your contractor is following all program requirements. The rebate requires proper electrical installation and TSBC inspection — if shortcuts were taken, you could lose your rebate eligibility and face safety issues.

Professional Next Steps

Contact your heat pump installer immediately if this is a new installation still under warranty. They should return to diagnose the electrical issue at no charge. If the installer is unresponsive or you suspect poor workmanship, hire an independent TSBC-licensed electrician for a proper electrical assessment. The cost for electrical troubleshooting typically runs $150-300 for the service call, plus repair costs.

Don't attempt any electrical work yourself — heat pump electrical systems can be lethal, and insurance won't cover damage from unpermitted electrical work. Get the problem properly diagnosed and repaired by licensed professionals to ensure your safety and protect your investment.