What is likely to result in frequent condenser cleaning when using a proprietary alkali cleaner?

The use of a proprietary alkali cleaner can lead to thinning of pipe walls and fin decomposition, which in turn may necessitate frequent condenser cleaning. Alkali cleaners are highly effective at removing certain types of deposits and contaminants, but they can also be quite aggressive on the materials used in condenser construction.

When these cleaners are not used correctly or when they react with the metals in the condenser, they can cause chemical reactions that degrade the metal, leading to thinning of pipes and deterioration of fins. This degradation can create a scenario where regular cleaning is required to manage the build-up of debris and corrosion products while trying to maintain efficiency.

Additionally, while improved heat exchange efficiency is a potential benefit of cleaning, it does not directly relate to the frequency of cleaning required. Overheating of the compressor and corrosion of the condenser coils could also arise from improper maintenance or use of unsuitable cleaning agents, but they are not the direct result of the use of an alkali cleaner as stated in the question. The focus on thinning of pipe walls and fin decomposition directly connects to the outcome of incorrect usage of the cleaner, thus necessitating more frequent cleaning.