Furnace service includes:

• check heat exchanger for cracks, rust, debris. clean as necessary

• check inducer for wear, noise, dust.

• check ignition system for wear and clean

• clean flame sensor. (most common cause of no heat calls)

• clean drain trap and drain tubing. (high efficient units)

• test manifold gas pressure, adjust as necessary

• check belts and pulleys

• check blower motor for wear, oil if possible, clean out cooling ports

• check fan wheel, vacuum or wash as necessary, adjust alignment if necessary

• check and tighten electrical connections

• check filters

• check for gas leaks

• clean burners, check for proper flame pattern

• clean fresh air and combustion air intakes

• check that venting for exhaust gases is unobstructed and up to code

• test for carbon monoxide emissions

• check for proper ductwork air flow

• check for unusual noises and possible causes

• vacuum entire furnace