2008 York 2-Stage Furnace – No Heat Call Responded to a no-heat issue and found the inducer high-temperature limit switch heavily corroded. Advised the client and proceeded with a full clean and service. After cleaning and tidying the connections, the limit switch is currently functioning. Checked all electrical circuits, amperage draw, and performed combustion checks. Cleaned the furnace as needed. Cleared drain lines. No safety concerns noted at this time, but the limit switch may have internal damage. If the issue returns, recommend replacing the inducer limit switch. Client inquired about rental water and I provided an estimate for water heater replacement. Also advised maintenance performed annually for the furnace. System operating normally at this time.