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Carrier furnace error code 33 is a common error in Carrier furnace models. The main reason for the error is that the gas valve solenoid coil was not energized. The heating coil will be disconnected from power and will not work if the gas valve solenoid coil does not work.
Common causes of this Carrier furnace error code:
-A wiring or circuit failure in the system
-The thermostat did not call for heat
-No power to the thermostat and/or electrical components
-Circuit breaker tripped or blown fuse
Carrier furnace error code 33 is generated when there is a problem with the flue gas system.
Carrier will send technicians to inspect and fix the issue when this error code is generated. They will find that the problem has already been fixed when they arrive.
"Inspections, Installations, Repairs & Maintenance"What follows is the practical information CANRO shares with Metro Vancouver homeowners about furnaces during in-home consultations. Carrier is American (founded 1915, invented modern A/C), best known for its Infinity 98 variable-speed modulating gas furnace and Greenspeed cold-climate heat pump. The brand's strengths are broad parts availability across Metro Vancouver, strong dealer training network, well-engineered combustion.
Heat-pump rebates from BC Hydro, FortisBC and the federal Greener Homes program stack to as much as $11,000+ for eligible Metro Vancouver households, dramatically changing the install-cost math vs. a conventional system. CANRO has worked with Carrier systems across Metro Vancouver since 1999, from older retrofits in Newton and Cloverdale to new builds in Yaletown and West End. Carrier is generally a strong fit for mainstream Vancouver homes prioritising parts availability and balanced cost-vs-performance.
Sizing. Proper furnace sizing requires a Manual J load calculation — most Vancouver homes need 50,000-90,000 BTU, but oversized furnaces short-cycle, accelerate component wear and produce uneven temperatures.
Lifespan. A well-maintained high-efficiency gas furnace lasts 15-20 years in Vancouver. The single biggest factor in lifespan is annual professional servicing — combustion analysis, condensate trap cleaning, and igniter inspection prevent 80% of mid-life failures.
Warning signs. A failing furnace usually announces itself: short-cycling, yellow flame (should be blue), rising gas bills, uneven heating between rooms, banging on startup, or persistent error codes on the control board.
Over 25+ years of Carrier service calls across Metro Vancouver, the recurring issues we see are: pressure-switch faults on 90%+ models, inducer-motor failure at the 10-12 year mark, condensate-drain freeze in unconditioned spaces.
Parts availability. Carrier parts are stocked at multiple Lower Mainland wholesalers, so emergency repairs rarely wait more than a day.
Yes. Annual professional servicing catches 80% of mid-life failures before they cause a no-heat call. It also keeps manufacturer warranties valid — most are voided by missing scheduled maintenance. The service includes combustion analysis, heat-exchanger inspection, flame-sensor cleaning, blower-motor check, condensate-trap clearing, and a full safety test for carbon monoxide.
For Metro Vancouver homes, 95-97% AFUE is the sweet spot — high enough to qualify for FortisBC rebates and capture nearly all available efficiency gains, but without paying a premium for the very last 1-2% from 98% AFUE modulating units. ENERGY STAR-certified models above 95% AFUE are required for current rebate programs.
Two-stage furnaces (high/low burner) are a good fit for most Vancouver homes — they cut short-cycling and run quieter than single-stage units. Modulating furnaces (continuously variable burner output) are worth the premium in larger homes (3,000+ sq ft), homes with significant temperature zones, or homes prioritising the absolute quietest operation.
A typical residential high-efficiency gas furnace installation in Metro Vancouver costs $4,500-$8,500 including the equipment, venting, gas-line work, permit, electrical, and removal of the old unit. Variable-speed and modulating models are at the upper end. CANRO provides three quote tiers (good/better/best) so you can choose the right balance for your home and budget.
Yes — for most Metro Vancouver homes, a cold-climate heat pump alone provides 100% of heating needs down to -10°C. Some homeowners choose a dual-fuel setup (heat pump + small gas furnace as back-up for the rare deep cold snap), but this is rarely necessary in our climate.
Short-cycling typically indicates one of: an over-sized furnace for the home, a dirty flame sensor, a clogged condensate drain triggering shutdown, low gas pressure, a failing limit switch, or a thermostat located in a non-representative spot (in direct sunlight, near a vent). All are diagnosed quickly during a service call.
To book Carrier furnace 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 Newton, Cloverdale, Yaletown and West End.
This guide was written by the CANRO Heating & Cooling team based on 25+ years of furnace installation, repair and annual service work across Metro Vancouver. Last reviewed May 2026.
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