Professional Wall Furnace Repair & Installation in Norwalk & La Mirada
Wall furnaces are a common heating solution in older Norwalk and La Mirada homes, particularly in apartments, condos, and smaller single-family residences built in the 1950s through 1970s. These direct-vent or gravity-vented gas heaters are simple, space-efficient, and reliable when properly maintained — but they do require periodic service to operate safely and efficiently.
We repair and install wall furnaces from brands like Comfort Glow, Empire, Williams, and Vanguard. Common repairs include thermocouple and thermopile replacement (the most frequent failure), pilot assembly cleaning or replacement, gas valve service, burner cleaning, and vent inspection. For units that are beyond repair or no longer available in parts, we handle complete wall furnace replacement including any required gas line modifications.
Safety is particularly important with wall furnaces because many older models are not sealed-combustion units — they draw combustion air from the room. We check for proper venting and oxygen depletion on every service call.
Our Wall Furnace Repair & Installation Process
Safety Inspection & Venting Check
We inspect the vent connector, check for proper draft, test for CO at the unit and in the room, and verify the pilot and main burner operate with clean, stable flames.
Thermocouple & Pilot Service
The thermocouple is the safety device that keeps the gas valve open when the pilot is lit. We test thermocouple output voltage, clean the pilot orifice, and replace the thermocouple if output is below manufacturer spec (typically 18–25 mV).
Burner & Gas Valve Testing
We clean the main burner ports, test gas valve operation, check manifold pressure, and verify proper flame pattern across all burner ports.
New Installation
For replacement installs, we remove the old unit, cap or repipe the gas connection as needed, install the new wall furnace, connect gas, test for leaks, light and test the unit, and verify proper venting.
We serve Norwalk, La Mirada, and 20 surrounding Southern California cities. Learn more about all our HVAC services or call 562-219-4085 for same-day service.