Heat Exchanger fouling in my Heating, Ventilation and A/C system

This has even made my heat exchanger run poorly and not as efficient as it should be

As a single mother it can be hard at times. My fiance and I split just a few years ago so trying to do things around the apartment that I have never done before is hard. Luckily I have a fantastic support system when it comes to doing repairs around my house. My brother is an electrician, my cousin is a plumber and my uncle is an Heating, Ventilation and A/C professional. It is a fantastic thing that I have my uncle to come and check out my Heating, Ventilation and A/C system a lot. My uncle is practically a saint because he has saved me from being stranded in a snowstorm and on a truly humid afternoon due to my air conditioning and furnace breaking on me. I have never been so glad for someone to come and maintenance my Heating, Ventilation and A/C system; Just recently my heat exchanger began to fail. There has been a buildup of deposits in the tube handle that has been making it not work properly. This causes more workload and wasted energy for my Heating, Ventilation and A/C system. This has even made my heat exchanger run poorly and not as efficient as it should be. My Heating, Ventilation and A/C professional has given me various chances that he could do to maintenance it, but he said that he could either replace the whole heat exchanger or clean it; One cleaning option was to mechanically maintenance the fouling of the heat exchanger tubes and the other was to chemically clean the heat exchanger tubes. I told him to do what he thought would be the best route to go.

air conditioning expert