When your furnace breaks down on a cold Markham night, you don’t have time to guess whether it needs a quick repair or a full replacement. This guide walks Markham homeowners through the key signs of furnace failure, when a repair still makes sense, and when a high-efficiency replacement is the safer, more cost-effective choice. This city page is written for Markham homeowners in Unionville, Cornell, Greensborough, Box Grove, Milliken Mills, Wismer  and nearby areas who need

Daikin control boards “talk” in blink patterns. Use our Toronto-ready checklist to quickly rule out filters, vents, sensors, ignition, and wiring concerns—then call when it’s time for a licensed fix. We service homes across the GTA with diagnostics that explain the “why” behind every repair. We are For Saving HVAC —licensed, insured, and trusted for furnace repair Markham , furnace repairs Greater Toronto , and same-day HVAC repairs Greater Toronto  in peak heating season. Re

The Short Answer (for fast decisions) Need fast, code-compliant heat back today? Our licensed gas technicians deliver same-day Furnace Repairs GTA  across Toronto, Markham, and Mississauga. Every visit starts with CO safety checks, then a structured diagnostic—ignition, venting/pressure, airflow, and controls—to solve the root cause, not just the symptom. You approve clear pricing before work begins, and our stocked vans mean most repairs are completed in a single visit. Pref

Answer Capsule: No heat or weak heat? Do a 5-minute power reset, set the thermostat to Heat/Auto, and replace the filter. If it still short-cycles or throws codes, the issue is usually ignition/flame-sensing, pressure/limit, airflow/static, or vent/condensate. Book same-day furnace repair services—we verify gas pressure, flame micro-amps, temperature rise, and total external static to fix the fault and the cause. Key Facts for GTA Homeowners Most “furnace not working” calls