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HomeRepair HelpRheem Central A/C RepairRheem Central air conditioner has poor temperature control Repair
Rheem Central air conditioner has poor temperature control
If your Rheem central air conditioner has poor temperature control, uneven cooling in the house, or the AC is not holding the thermostat temperature, start with the air filter. A clogged air filter restricts airflow through the furnace or air handler, reduces cooling capacity, and can cause the evaporator coil to frost over. Next, check the wall thermostat. Failed electrical contacts or faulty thermostat wiring can make the furnace or air handler and condensing unit operate intermittently or not at all; a thermostat can be tested for continuity with a multimeter and replaced if it fails. Blocked or leaking vents can also create weak airflow and inconsistent room temperatures. If the filter, thermostat, and vents are in good condition, an oversized air conditioner may cool rooms too quickly and shut off before air circulates evenly. Enter your Rheem model number to find the exact replacement air filter, thermostat, or other part for your central air conditioner. Filter and thermostat checks are generally DIY repairs, but shut off power before servicing. Work inside the condensing unit involves 240-volt line voltage, and any sealed-system or refrigerant repair requires an EPA 608-certified HVAC technician.
01 - Rheem Central Air Conditioner Air Filter
Check and replace the air filter at least twice a year, more often in dusty/dirty environments or if there is a pet in the home. A clogged air filter will greatly reduce the air flow of the furnace or air handler which can result in poor temperature control when trying to heat or cool the home.
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Highly Likely
02 - Rheem Central Air Conditioner Wall Thermostat
The wall thermostat has electrical contacts that control the power supply to the furnace or air handler and condensing unit. If the contacts in the thermostat fail, certain components of the cooling system may not work or may only work intermittently. To determine if the thermostat is defective, use a multimeter to test it for continuity. If the wall thermostat does not show proper continuity, replace it.
Common
03 - Rheem Central Air Conditioner Wifi Thermostat
The WiFi thermostat has electrical contacts that control the power supply to the furnace or air handler and condensing unit . If the contacts in the thermostat fail, certain components of the cooling system may not work or may only work intermittently. To determine if the thermostat is defective, use a multimeter to test it for continuity. If the WiFi thermostat does not show proper continuity, replace it.
Common
04 - Clogged Air Filter
If the air filter is clogged, air cannot flow properly through the home's venting system. This greatly reduces the cooling capacity of the air conditioner. In addition, if the air filter is clogged, the evaporator coils will frost over and not be able to remove moisture from the air. The air filter should be checked and replaced at least twice a year, more often in dusty/dirty environments. Refer to owner's manual for guidance.
Less Common
05 - Blocked or leaking vents
The furnace or air handler must have good airflow to work properly. A blocked or leaking vent can prevent good air flow and cause inconsistent room temperatures.
Less Common
06 - Oversized air conditioner
An oversized furnace or air handler will quickly heat or cool the home and shut off. This causes acceptable temperatures in certain areas but not in others. The circulated air needs time to distribute evenly throughout the home; the air recirculating through the furnace or air handler for longer periods of time will produce better results.
Less Common
Frequently Asked Questions
Why does my central air conditioner have poor temperature control?
Can a thermostat cause my central air conditioner not to cool evenly?
Can an oversized air conditioner cause uneven cooling or temperature swings?
What should I check if my AC is not blowing enough air?
How do I find the correct Rheem central air conditioner part?
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