If your AC is blowing warm or room-temperature air in Spring TX, something has failed in the cooling process. This guide covers the 7 most common causes โ from a tripped breaker you can fix in 60 seconds to a refrigerant leak that needs a licensed technician.
Need diagnosis right now? Same-day service available. Diagnostic fee waived with qualifying repair.
Check your thermostat right now. If it's set to FAN instead of COOL, the blower runs continuously blowing uncooled air. If set to HEAT, same result. Switch to COOL + AUTO and wait 5 minutes.
๐ฐ Cost: Free โ DIY fix
The outdoor compressor and indoor air handler run on separate breakers. If the outdoor breaker tripped, the indoor fan blows but no cooling occurs. Find the breaker panel, reset the AC breaker once. If it trips again immediately โ stop and call.
๐ฐ Cost: Free if breaker reset. Electrical repair $150โ$400 if fault found.
Low refrigerant means the system can't absorb heat from your home. Air blows but stays warm. Always indicates a leak โ adding refrigerant without fixing the leak wastes money. Requires EPA Section 608 certified technician.
๐ฐ Cost: $200โ$600 for leak repair + recharge
The compressor pumps refrigerant through the system. If it fails, no cooling occurs regardless of everything else working. The outdoor unit may hum or be completely silent. Often misdiagnosed โ get a second opinion before approving a compressor replacement.
๐ฐ Cost: $1,500โ$3,500. Sometimes replacement makes more sense.
A heavily coated evaporator coil can't absorb heat from indoor air. The air passes over it but stays warm. Annual maintenance prevents this โ once it's dirty, professional cleaning is needed.
๐ฐ Cost: $200โ$400 professional coil cleaning
If you have a heat pump system, the reversing valve switches between heating and cooling modes. A stuck or failed reversing valve can cause the system to blow heat in summer. Common in older heat pump systems.
๐ฐ Cost: $300โ$600 to replace reversing valve
Ice on the copper line near the indoor unit indicates the system is frozen. Air blows warm because airflow is blocked. Switch to FAN ONLY for 2โ4 hours to thaw, then call for diagnosis.
๐ฐ Cost: Free to thaw. Underlying cause repair $200โ$600
The most common causes are: thermostat set to FAN instead of COOL, a tripped circuit breaker to the outdoor unit, low refrigerant from a leak, or a failed compressor. Start with the thermostat and breaker panel โ both are free DIY checks that take under 2 minutes.
Check the thermostat (set to COOL + AUTO), then check the circuit breaker for the outdoor unit. If both look fine, look at the outdoor unit โ is it running? If the outdoor unit is off but the indoor fan is on, you have an electrical or refrigerant issue that needs a technician.
Yes โ low refrigerant is one of the most common causes of warm air. The system runs but can't remove heat from your home. Low refrigerant always indicates a leak that must be found and repaired. A technician must handle refrigerant under EPA regulations.
Costs depend on the cause: thermostat/breaker fix is free, refrigerant leak repair runs $200โ$600, compressor replacement $1,500โ$3,500. AC Repair Expo waives the diagnostic fee with qualifying repair. Same-day service available in many cases.
Rated 5.0 ยท 700+ Google reviews ยท Read all reviews
"Found the issue fast and fixed it same day. Honest diagnosis, no upselling. Exactly what you want when your AC goes out in July."โ Spring TX homeowner, 77386
"Another company quoted thousands more. Expo gave us the honest answer and saved us from a bad decision. They've earned a customer for life."โ Harmony, Spring TX
"Professional, fast, and fair. Isaac explained everything before starting. Bill was exactly what was quoted. Highly recommend."โ Klein area, 77388
1827 Riley Fuzzel Rd Suite C, Spring, TX 77386
Serving Harmony, Benders Landing, Legends Ranch, Imperial Oaks, Spring Trails, The Woodlands.
19507 Wied Rd Suite B, Spring, TX 77388
Serving Klein, Champion Forest, Vintage Park, Gleannloch Farms, Tomball, Cypress.
AC Repair Expo Heating & Cooling Inc โ same-day diagnosis and repair across Spring TX, The Woodlands, Tomball, Klein, and North Houston. Honest diagnosis, fair pricing, licensed TACLB43277C.
Riley Fuzzel Rd: 1827 Riley Fuzzel Rd Suite C, Spring TX 77386 ยท Wied Rd: 19507 Wied Rd Suite B, Spring TX 77388
