"This is the most neglected piece of equipment on a house until you really need it," Speakman told Nashville's News 2 as he worked on a two-ton, 26,000-BTU air conditioning unit in Hermitage Friday.
"Anything over 95 [degrees] is kind of unpredictable," he continued.
With Middle Tennessee experiencing a prolonged record heat wave, Speakman offered advice to homeowners like Kevin Reynolds, whose air conditioners are struggling to keep things cool in the sweltering heat.
"It's tolerable, luckily we've got ceiling fans, we weren't sitting in there just roasting," Reynolds said, adding, "I like it at 75. It's actually staying at 80 now."
"The way temperatures have been here lately I don't know if I could survive without A/C," joked Reynolds.
Speakman said expecting your air conditioner to maintain a cool of 60 degrees in triple digit heat may be unrealistic.
Instead, he said if an A/C unit is having trouble cooling a house to 73 to 78 degrees, it could be time for a service call.
"If you haven't had it checked in a year or two, you really should have [the unit serviced] to check it just in case," he said.
The sweltering heat is expected to continue through the weekend. Check the latest forecast at WKRN.com/Weather.