What to Do When Your Heat Pump Is Not Defrosting
A heat pump that is not defrosting properly will gradually lose heating capacity as ice builds up on the outdoor coil. This guide covers what to check and when to call for service in Greater Vancouver.
Immediate Steps to Take
1. Observe the outdoor unit for one full cycle — a normal defrost cycle lasts 5-15 minutes and occurs every 60-90 minutes. You should see steam rise and water drip from the unit. 2. If the defrost cycle is not activating, set your thermostat to emergency heat mode (if available) to bypass the heat pump and use backup heat only. 3. Check the outdoor temperature — defrost cycles are less frequent or unnecessary when outdoor temperatures are above 5°C. 4. Inspect the outdoor coil for dirt or debris buildup — a dirty coil cannot absorb heat effectively and will frost faster than the defrost can manage.
Next Steps
5. Gently rinse the outdoor coil with a garden hose to remove surface dirt — do this when the unit is off and the coil is not frozen. 6. Check the defrost sensor location — it is typically a small metal probe attached to the outdoor coil tubing. If it has fallen off or is misaligned, the defrost cycle will not work correctly. 7. Call for professional service if the defrost cycle does not activate at all, if ice accumulates despite the defrost running, or if the unit is making unusual grinding or rattling sounds during defrost.
When to Call BC Wide
If the steps above do not resolve your issue or if you encounter any gas odour, carbon monoxide alarm, electrical hazard, or visible damage, contact BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning immediately. Our licensed technicians are available for prompt service across Greater Vancouver. Emergency service is available for urgent situations. Call (604) 330-3953 for fast, professional help.
Why Professional Service Matters
Attempting HVAC repairs without proper training and licensing can be dangerous — especially with gas-fired equipment. Licensed gas fitters have the training, diagnostic equipment, and parts to safely diagnose and repair your system. BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning technicians are Red Seal certified, fully licensed, and insured for your protection.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.