Homeowner Guide

Think the AC is low on refrigerant? Start with symptoms, not a guess.

Low refrigerant is one possible reason an AC freezes, runs too long, or stops cooling well. It is not something to confirm by feel alone. Scott needs the symptom pattern first so the diagnostic starts in the right place.

Signs homeowners often notice first

The house may cool less than it used to, the system may run most of the day, or air may move from the vents without feeling cold enough. Ice on the indoor coil or copper line can also show up, especially when airflow or coil condition is already part of the problem.

Do not assume refrigerant is the only issue

Dirty filters, blocked returns, dirty coils, blower problems, thermostat behavior, electrical issues, and leaking equipment can overlap with low refrigerant symptoms. A useful diagnosis confirms what is happening before repair work or added parts are discussed.

HVAC service hoses and valve tools connected at an outdoor air conditioner service port
Sealed-system testingA service connection supports the diagnosis. It does not prove low refrigerant or identify the cause by itself.
Read what to do if the AC is freezing up

What to text before the visit

Send the address, city, thermostat setting, indoor temperature, how long the AC runs, whether airflow feels weak, and photos of any ice. If the system is frozen, shut cooling off and let it thaw before expecting a useful check.

The first visit should confirm the cause

The $95 Springfield Diagnostic is the right starting point when low refrigerant is only a suspicion. Nearby towns may cost more based on drive time and location. Repair pricing should come after the issue is confirmed.

Read the diagnostic page