KeepRite high-efficiency gas furnace in a North York basement, closed up after the gas valve replacement

Red Tag Correction, North York

Leaking Gas Valve on a KeepRite Furnace: Replaced and Corrected

A KeepRite high-efficiency gas furnace in North York had been flagged with safety violations. The gas valve was defective and let gas through to the burners even when the furnace wasn’t calling for heat. We replaced the valve, added supports to the PVC venting, and tested the furnace so the Enbridge violation could be cleared.

  • Problem: Gas valve passing gas with no call for heat, plus unsupported vent piping
  • Equipment: KeepRite high-efficiency gas furnace
  • Location: North York, Toronto
  • Fix: New compatible gas valve, galvanized strapping on the intake and exhaust pipes
  • Completed: October 2026
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The Problem

Why a Gas Valve That Won’t Close Gets Red Tagged

A furnace gas valve has one job when the thermostat is satisfied: stay shut. This one didn’t. It was letting gas reach the burners with no call for heat, which is a serious safety concern and the main reason the furnace had been written up.

A valve that fails this way can’t be adjusted or cleaned back into service. It has to come out.

KeepRite high-efficiency gas furnace with the front panel off, showing the gas valve, inducer and PVC venting
Gas valve held at the furnace burner compartment during the valve replacement in North York

The Repair

Swapping in a New Compatible Gas Valve

Our technician removed the faulty valve from the burner compartment and installed a new replacement valve that’s compatible with this KeepRite furnace, then reconnected its wiring.

The Venting

Securing the PVC Intake and Exhaust Pipes

The violation notice also listed the venting. A high-efficiency furnace draws combustion air in and sends exhaust out through PVC pipes, and those runs need proper support along the way.

We added galvanized metal strapping and vent pipe mounting hardware to hold the intake and exhaust piping firmly in place, which took care of the deficiencies on the notice.

Galvanized metal strapping added to support the PVC combustion air intake and exhaust pipes
Burners lit on the KeepRite furnace with a digital manometer connected during operational testing

Testing

Checking the New Valve Under Fire

With the repairs done, we ran the furnace and confirmed the new gas valve was operating properly, along with ignition and burner performance. Pressure readings were taken with a digital manometer as part of the operational testing.

Project summary: a red tag correction on a KeepRite high-efficiency gas furnace in North York, Toronto, in October 2026. A defective gas valve that passed gas to the burners without a call for heat was replaced with a new compatible valve, and the PVC combustion air intake and exhaust piping was secured with galvanized strapping. The furnace was tested for gas valve operation, ignition and burner performance to address the Enbridge gas safety violation.

Project Photos

KeepRite high-efficiency gas furnace with the front panel off, showing the gas valve, inducer and PVC venting

Furnace gas valve held up in front of the open KeepRite furnace during the replacement

Gas valve held at the furnace burner compartment during the valve replacement in North York

Close-up of a furnace gas valve next to the open KeepRite furnace

Gas valve held beside the KeepRite furnace, with its parts box on the floor

PVC combustion air intake and exhaust piping running from the furnace across the basement ceiling

Galvanized metal strapping added to support the PVC combustion air intake and exhaust pipes

Burners lit on the KeepRite furnace with a digital manometer connected during operational testing

Digital manometer connected at the new gas valve, reading the furnace gas pressure

Digital manometer connected to the furnace during the pressure readings taken in testing

KeepRite high-efficiency gas furnace in a North York basement, closed up after the gas valve replacement

Gas Furnace Safety Repairs in North York

We handle red tag corrections and gas furnace repairs for homes in North York and across Toronto. See our heating and cooling services in Toronto, learn how our red tag removal service works, or read about repairs on KeepRite furnaces and our wider furnace repair work.

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