Cleaning Furnace Secondary Heat Exchanger

In most cases this part looks much like a small radiator some have a baffle style exchanger which looks much like dishes setting in a dishwasher and 100 of the air blown from the fan must travel through it during both the heating cooling seasons.

Cleaning furnace secondary heat exchanger.

Beware the fins of the coil are easily bent so keep your air pressure a few inches away from the coil surface. Cleaning the secondary heat exchanger in a condensing furnace is usually difficult and a mess. Some fans are held in by screws or bolts. In condensing furnaces there is a secondary heat exchanger made up of small tubes that receive the exhaust gases once they have gone through the primary heat exchanger.

Secondary heat exchanger cleaning. That was best avoided. To the best of my knowledge this unit does not have a secondary heat exchanger as it only has one heat exchanger. Remove these with a screwdriver or ratchet in order to take the fan out.

Here more heat is extracted resulting in the gases that are cooled to the point that they condense into water and carbon dioxide. If you crawled in then just take a vacuum cleaner with you and crawl in and clean away also a long handled brush will help. A home heat exchanger is less likely to fail due to dirt and grime then a heat exchanger in a car or ship. Place your vacuum suction below the reheat coil and using air pressure carefully blow the coil clean.

A shady repair technician may try to trick you into believing the heat exchanger in your furnace is cracked and leaking deadly amounts of carbon monoxide into your home. A rheem rgda model furnace is used for the demonstration. Usually i d guess that lack of regular maintenance led to the sooting problem. Secondary condensing heat exchanger.

The heat exchanger is connected inside the furnace or boiler with metal tubes that transport the water and air exchange. A heat exchanger in your furnace or boiler is what heats either air or water that is then used to heat your home. Most build up will be on the blower side or bottom of the reheat coil. I suggest a mask and goggles for safety purposes.

A demonstration of how to clean a heat exchanger on an older draft hood style gas furnace. The secondary heat exchanger in high efficient furnaces are a very important component to have cleaned. You can wrap a small piece of tape around each wire and label it to make reassembly easier just make sure to remove the.