Expert Furnace Repair for Blackstone Properties
Blackstone winters regularly bring nighttime temperatures into the teens. For homes relying on heat pumps with electric backup or dual-fuel systems paired with LP gas furnaces, a stuck reversing valve or failed emergency heat sequencer can cause immediate indoor chill or dramatic electric bill spikes.
Our Blackstone shop carries OEM heating sequencers, dual-fuel control boards, igniters, and calibrated combustion analyzers. We diagnose the true electrical or mechanical fault and provide written options before any repair proceeds.
Pressure Switch & Inducer Motor Issues
The draft inducer motor must pull a vacuum through the heat exchanger before the control board permits the gas valve to open. If the inducer motor fails, the chimney flue is restricted, or the condensate trap in a condensing furnace is clogged, the pressure switch will stay open and shut down the cycle. We test vacuum levels with digital manometers to identify the exact restriction.
Gas Valve & Manifold Pressure Calibration
Gas valves must supply exact fuel pressure to the burners — typically 3.5 inches of water column for natural gas and 10.0 inches for propane. Improper pressure causes soot, delayed ignition, or incomplete combustion. We test line and manifold pressure, replacing stuck or failing gas valves to factory tolerances.
Control Board & Fault Code Interpretation
Modern furnaces communicate through LED diagnostic flash codes on the integrated control module. We decode these signals, test high-voltage relays, check 24V transformer output, and verify that the board is executing the correct safety sequence without intermittent faults.