On this occasion one of my main activities was to check the gas heater since it does not turn on.
Initially, most of the main pieces were disassembled, the largest ones, which is the burners and the exchanger, compressed air was applied to clean it of any odor, here more or less amount came out.
When pressurized air was applied to the exchanger, a lot of odor came out, which prevents heat exchange, I put it together and everything worked well.
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