Performed cleanings on the furnace, AC, and fireplace. Furnace: Primary heat exchanger is starting to show signs of wear. No cracks detected. Combustion readings were a little high which means the secondary heat exchanger is possibly starting to wear out as well. Still working properly and safely. AC: No leaks detected. Electrical components tested good. Condenser is clean. Refrigerant tested good. Unit is cooling at this time. Fireplace: I got the fireplace to light after a few attempts. I cleaned the pilot assembly, wiped away and dust, replaced the embers and replaced the glass. Pilot lit on the first attempt every time after the cleaning. All HVAC equipment is operating normally and safely at this time. However, in regards to the furnace and AC, due to age and condition, we cannot guarantee long life expectancies. Another tech will be out to fix the gas leak.