For a Markham furnace that will not start or produces cool air, record the fault display and what happens when heat is requested. Conventional and condensing equipment have different venting and drainage arrangements. Compare a confirmed component repair with replacement using the furnace condition and findings, rather than an age cutoff.
A furnace that will not start, produces cool air, or heats rooms unevenly needs diagnosis before a repair or replacement decision can be made. The inspection differs for a conventional furnace and a high-efficiency condensing model because their venting and condensate components are not the same. Fault evidence may point to an igniter or flame-sensing problem, a control issue, restricted airflow, or damage that changes whether repair is appropriate. A service request can describe the symptoms and equipment details for review.
Record the furnace fuel and model, any displayed error code, when the symptom began, and whether it affects the whole home or particular rooms. A qualified inspection can compare the ignition sequence, airflow, controls, and venting with the unit’s design. Heat-exchanger damage or repeated faults can change the repair-versus-replacement decision; age alone does not establish that a furnace should be replaced.
A no-start or cool-air complaint can arise from different points in the heating sequence. Ignition faults involve components such as the igniter or flame sensor, while a thermostat or control problem may prevent a heat call from reaching the furnace. The display code and observed sequence help distinguish these possibilities. Internal electrical, fuel, and combustion checks belong to a qualified service inspection, not occupant troubleshooting.
A failed component may be repairable, but a damaged heat exchanger or recurring major faults can alter the decision. Inspection findings, the condition of other components, and the cost and scope of the proposed work are more useful than a simple age cutoff. A high-efficiency condensing furnace also has venting and condensate parts that differ from conventional equipment, so those findings should be included when considering replacement.
Maintenance is separate from repairing a known fault. The service scope can include checking airflow, the filter, burners, controls, and venting when those items apply to the furnace model. Findings determine whether adjustment, cleaning, or a repair is indicated; manufacturer instructions guide the work. If the inspection reveals a safety concern or a failing component, that specific issue should be assessed rather than treated as routine upkeep.
Show how the finished layout preserves access to filters, controls, and the appliance. Ask whether altered returns or enclosed spaces affect the reported fault. A service and renovation plan should distinguish heating performance from changes to the mechanical room, then record any distribution correction required for the occupied basement.
Leave burner, fuel, venting, electrical, and internal equipment work to a qualified contractor. Do not bypass a safety switch or repeatedly reset a furnace.
Send the property location, equipment information, and requested work for review.
