What Often Fails in Fort Collins AC Units
The low humidity and high summer heat in Northern Colorado are tough on condensers and compressors. Units often run longer and harder. Refrigerant leaks are a frequent issue, as the constant thermal expansion and contraction can weaken joints and lines over time.
Dust and pollen from the arid landscape and agricultural areas around Loveland can clog evaporator coils and filters quickly. This reduces airflow, causing the system to overheat and potentially trip safety switches. Blower motor failures are also common, especially in systems that have been straining against dirty filters.
How a Technician Diagnoses Your System
The HVAC technician we connect you with will start by checking the basics: thermostat settings, the circuit breaker, and the air filter. They will listen for unusual noises from the condenser fan motor or compressor.
Using gauges, they will measure the refrigerant pressure to check for leaks or low charge. They will inspect the capacitor, a component that helps motors start, which often fails in the heat. Electrical connections at the contactor in the outdoor unit will be checked for corrosion or burning, a common problem after our dusty winters.
What You Can Check Before Calling
- Make sure the thermostat is set to 'Cool' and the temperature is set below the current room temperature.
- Check the electrical panel for a tripped breaker serving the outdoor condenser unit or the indoor air handler.
- Inspect the air filter. A clogged filter is a top cause of reduced cooling and system shutdowns.
- Ensure the outdoor condenser unit is clear of leaves, grass clippings, or other debris that block airflow.
- Listen for the sound of the indoor blower fan running. If it's silent, the issue may be electrical at the air handler.
Repair Scope and Timing
Many repairs, like replacing a capacitor, contactor, or a clogged filter, can often be completed in a single visit of one to two hours. The technician will carry common parts for the brands popular in this region.
For a refrigerant leak, the technician must first locate and repair the leak, then evacuate and recharge the system. This is a more involved process that typically takes half a day. The total cost depends heavily on the location and extent of the leak.
If a major component like the compressor fails, the repair decision depends on the age of your unit. The technician can provide you with options for repair versus replacement, considering the efficiency of newer models suited to our climate.
Questions homeowners ask
My AC is blowing warm air. What's the most likely cause?
In our area, this is often due to a refrigerant leak or a problem with the compressor in the outdoor unit. Low refrigerant from a leak is common as systems age. It could also be a failed capacitor preventing the compressor from starting. A dirty evaporator coil inside your air handler can also cause this.
When should I consider replacing my AC unit instead of repairing it?
Many technicians suggest considering replacement if your unit is over 12-15 years old and the repair cost approaches half the cost of a new system. Older R-22 refrigerant systems, common in Fort Collins homes built before 2010, are especially costly to repair due to the obsolete refrigerant. Newer, high-efficiency units are better suited to handle our summer heat.
Why does my AC freeze up on cooler summer nights?
This is a frequent issue here due to our large temperature drops after sunset. If the system is oversized or has a dirty filter reducing airflow, the evaporator coil can get too cold and freeze. Running the fan in 'On' mode instead of 'Auto' can sometimes help prevent this, but a technician should check the refrigerant charge and airflow.
How can I prevent common AC problems?
The most important step is changing your air filter monthly during cooling season due to our dust. Keep shrubs trimmed back at least two feet from the outdoor condenser unit. Have an HVAC technician perform a preseason check to clean the coils, check the refrigerant charge, and ensure electrical connections are tight before the intense summer heat arrives.