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The article's author shared a possible cause of the e7 error on the heat pumps and linked to articles discussing it.
Although it is not common for residential heat pumps to have an e7 error, it does happen and can be caused by various things.
Hello, I recently had a problem with my heat pump, and I would like to ask for some help.
I started getting an error code E7 about a week ago, and unfortunately, it did not seem to be related to the scale of the issue. The problem was that all the lights on the front of my heat pump were flickering at random intervals, which was extremely inconvenient when trying to sleep at night or use it during work hours. To fix the issue, I had to unplug it for about 15 minutes and then plug it back in again. This process is somewhat frustrating because sometimes it takes up to 5 minutes before the whole cycle is complete, and sometimes the system shuts off without any warning (which is always frustrating).
The e7 error is a type of error that might occur in a heat pump when the thermostat's indoor temperature is below freezing.
The most common cause for the e7 error is a blocked drain line. It's also possible that some insulation material has frozen to the inside of the pipe. Since this problem doesn't happen often, it's best to turn off your heat pump and call a professional to address it.
For an energy recovery ventilator (ERV) system to work properly, there must be free space of at least 4 inches from the building face along walls, ceilings and floors on all sides of each unit.
"Inspections, Installations, Repairs & Maintenance"
If you are considering heat pumps, this guide walks through the key technical and practical points specific to Metro Vancouver. A cold-climate heat pump in Metro Vancouver delivers 2-4 units of heat per unit of electricity — meaning 200-400% effective efficiency vs 95-98% for the best gas furnace. Vancouver's mild winters (rare lows below -5°C) are ideal heat-pump territory.
Metro Vancouver's housing stock ranges from early-1900s character homes with hydronic radiator systems to modern condos with combi boilers — equipment selection and serviceability vary dramatically by housing era. CANRO has worked with heat pump systems across Metro Vancouver since 1999, including installations and service calls in Cloverdale, Sullivan, Seafair and Saunders.
Sizing. Heat-pump sizing balances heating capacity at design temperature (often -10°C in Metro Van) against cooling load. Variable-capacity units handle both ends well — over-sizing for heating causes summer humidity problems.
Lifespan. A modern heat pump installed by a qualified contractor typically lasts 15-20 years. Annual maintenance, regular filter changes, and keeping the outdoor coil clear of leaves and debris all extend service life.
Warning signs. Heat-pump issues include short-cycling, refrigerant-charge problems (low cooling capacity), defrost-cycle faults, communicating-system errors, and ECM motor failures at 12+ years.
Yes. Modern cold-climate heat pumps from Mitsubishi (H2i), Daikin (Aurora), Carrier (Greenspeed) and Lennox (XP25) maintain rated heating capacity down to -15°C and continue producing heat (at reduced capacity) down to -25°C — far colder than Metro Vancouver ever gets.
If you already have ductwork from a furnace, a ducted central heat pump is usually the better choice for whole-home comfort. Ductless mini-splits are ideal for additions, basement suites, garage conversions, and homes without ducts (radiant-heated houses).
A whole-home ducted heat pump installation in Metro Vancouver typically costs $13,000-$22,000 before rebates. After stacking BC Hydro + FortisBC + federal rebates, eligible homeowners can see net costs of $5,000-$11,000.
Yes — every heat pump is also a fully functioning air conditioner. One unit replaces both a furnace and an A/C, saves floor space, and qualifies for rebates that a separate A/C alone would not.
SEER measures cooling efficiency (higher is better, 16-22 typical); HSPF and the newer HSPF2 measure heating efficiency. For Vancouver, look for HSPF2 above 9.0 — that's the threshold for premium cold-climate performance and most rebate programs.
Current heat-pump rebates can total $11,000+ for eligible Vancouver homeowners: up to $6,000 from CleanBC, up to $5,000 from federal Greener Homes, plus income-qualified top-ups. CANRO is a registered contractor and handles the paperwork end-to-end.
To book heat pump service or get a free written quote for installation, call CANRO at (604) 359-1081 or email info@canroheat.ca. We service all of Metro Vancouver including Cloverdale, Sullivan, Seafair and Saunders.
This guide was written by the CANRO Heating & Cooling team based on 25+ years of heat pump installation, repair and annual service work across Metro Vancouver. Last reviewed May 2026.
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25+ years keeping Metro Vancouver homes comfortable. Honest advice, upfront pricing, work that lasts.