Carrier 58SB0 Comfort™ 80 Gas Furnace 13: Limit circuit lockout
The furnace control is reporting a limit-circuit lockout condition.
Carrier 58SB0 Comfort™ 80 Gas Furnace 14: Ignition lockout
The furnace control is reporting an ignition lockout condition.
Carrier 58SB0 Comfort™ 80 Gas Furnace 21: Gas heating lockout
The furnace control is reporting a gas-heating lockout condition.
Carrier 58SB0 Comfort™ 80 Gas Furnace 22: Abnormal flame-proving signal
The furnace control is reporting an abnormal flame-proving signal.
Carrier 58SB0 Comfort™ 80 Gas Furnace 23: Pressure switch did not open
The furnace control is reporting that the pressure switch did not open as expected.
Carrier 58SB0 Comfort™ 80 Gas Furnace 24: Secondary voltage fuse is open
The furnace control is reporting that the secondary-voltage fuse is open.
Bosch Heat Pump System with York Gas Furnace Installation in Boston, MA

Green Flow Solution recently completed a Bosch heat pump system with a York gas furnace installation in Boston, Massachusetts, providing the homeowner with a reliable, energy-efficient dual-fuel heating and cooling solution. If you’re considering upgrading your home’s heating and cooling system, a Bosch heat pump paired with a York gas furnace offers outstanding efficiency, comfort, […]
Trane 5DCZ5060A1 IGN 5 Flashes: Flame sensed without the gas valve energized
Trane PKGR-SVX006B-EN 5DCZ5 EarthWise Hybrid diagnostic tables identifies 5 flashes on the Liteport LED as flame sensed when the gas valve is not energized or flame sensed with no W signal.
Trane 5DCZ5048A1 IGN 5 Flashes: Flame sensed without the gas valve energized
Trane PKGR-SVX006B-EN 5DCZ5 EarthWise Hybrid diagnostic tables identifies 5 flashes on the Liteport LED as flame sensed when the gas valve is not energized or flame sensed with no W signal.
Trane 5DCZ5042A1 IGN 5 Flashes: Flame sensed without the gas valve energized
Trane PKGR-SVX006B-EN 5DCZ5 EarthWise Hybrid diagnostic tables identifies 5 flashes on the Liteport LED as flame sensed when the gas valve is not energized or flame sensed with no W signal.