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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8171
Experience:  Furnace, A/C and heat pump specialist.
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Lennox 14acx not cooking below 75 degrees. In Houston and it's

Customer Question

Lennox 14acx not cooking below 75 degrees. In Houston and it's 99 this week. What should we check before calling an HVAC company?
Submitted: 2 years ago.
Category: HVAC
Expert:  airheatman replied 2 years ago.
Hello. My name is ***** ***** I'll do my best to help. Let's get started and see what we can do.
Do both indoor and outdoor units come on when you call for cool at thermostat?
Customer: replied 2 years ago.
Customer: replied 2 years ago.
It is cooling but not below 75
Expert:  airheatman replied 2 years ago.
OK next, can you tell if the compressor is actually coming on in outdoor unit or just fan? Feel of the large copper piping leaving outdoor unit and tell me if it is beer can cold, cool or outdoor temp.
Customer: replied 2 years ago.
It is cold
Customer: replied 2 years ago.
I would say 50 degrees
Customer: replied 2 years ago.
Expert:  airheatman replied 2 years ago.
OK .If ac is cooling to 75 on a 99 degree day, it is probably doing the best it can do.AS a contractor here in south Alabama , we receive about 3 calls a week on these days with triple digit heat index days where there is not much we can do.
Most contractors size equipment based on a manual j load calculation as recommended by national guidelines.Since Houstons design summer temp is 94 degrees, that is what the system is probably designed to cool.
The unit is probably doing all it can and a service call will result in being told there is not much they can do.
Make sure filters are clean and curtains or blinds are closed where possible to help the situation.
Apart from upgrading to a larger system, you might consider adding a small window ,portable or mini split to help out with the access load on these hot days.
Customer: replied 2 years ago.
Expert:  airheatman replied 2 years ago.
Wish I had better nws and there was more we cold do, but I think the unit is doing all it can.
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