Performed heating maintenance on two gas-fired furnaces, one in the attic and one in the basement. Confirmed operation, cleaned blower cabinets, gas burners, and flame sensors, and checked electrical for both systems. Both units had a 50-degree temperature rise and are operating as expected. Customer had already changed the 14x24x1 filters. Also performed dryer vent cleaning, finding the outside vent blocked with no access under the deck, so cleaned from the inside. Noted that the water heater is almost 10 years old, with the homeowner scheduling a plumber for replacement.
