Heat Exchanger Maintenance Quiz

What should be checked in a heat exchanger prior to each heating season to ensure its proper functioning?

• Electrical connections

• Cracks, open seams, rust, thinning of walls, and gasket/seal leaks

• Air filter cleanliness

• Thermostat settings

Which of the following is NOT a method used in general leak testing procedures for heat exchangers?

• Visual inspection

• Chemical test

• Acoustic monitoring

• Observing the flame before and after indoor blower operation

What should be inspected on a gas furnace to ensure it is free from rust, dirt, and damage?

• Blower access door

• Burners

• Flue gases

• Combustion air availability

Which component should be checked for loose joints during gas furnace maintenance?

• Furnace compartment

• Burners

• Flue pipe

• Blower access door

During a maintenance check, what should be ensured about the combustion air in a gas furnace?

What is a necessary action to take while the gas furnace system is running during maintenance?

• Close all access doors

• Check all components for proper operation and overall system performance

• Turn off the main power supply

• Inspect only external components

What should you arrive with when troubleshooting gas furnaces to ensure efficiency?

• Only the specific tool for the known problem

• A comprehensive set of tools and instruments

• A notebook and pen

• A flashlight

What is the first step recommended when beginning to troubleshoot a gas furnace?

• Check the manufacturer's manual

• Replace all old parts

• Start with the obvious issues like blown fuses

• Consult a professional

What does a single flash of the LED light status indicate in gas furnace troubleshooting?

• Pressure switch stuck closed

• Open high-limit switch

• System lockout due to retry

• Grounded sensor

What does a continuous flash of the LED light status signify?

• Flame sensed with no call for heat

• Pressure switch stuck open

• Open rollout switch

• System operating normally