AC BLOWING WARM AIR
IN ARIZONA?
7 CAUSES — AND HOW TO FIX THEM
Your AC is running but your home isn't cooling. In Arizona's summer heat, this is a genuine emergency. Here's exactly what's wrong and what to do about it — from Bradford Heating & Cooling in Surprise, AZ.
CHECK THESE TWO THINGS FIRST — BEFORE CALLING ANYONE
1. Thermostat: Is it set to COOL (not FAN or HEAT)? Is the setpoint at least 5°F below current room temp? | 2. Air filter: Is it visibly dirty or clogged? Replace it and wait 30 minutes. If neither fixes it, read on.
THE 7 MOST COMMON CAUSES
Listed in order of frequency in Arizona's West Valley. Bradford diagnoses the exact cause before quoting any repair.
Failed Capacitor
Most CommonThe capacitor is a small cylindrical component that gives your compressor and fan motors the jolt of electricity needed to start. When it fails, the compressor can't start — so the fan runs but no cooling happens. You may hear a humming or clicking sound from the outdoor unit.
BRADFORD'S FIX
Bradford stocks USA-made Turbo capacitors on every truck. Typical repair time: 30–45 minutes. Flat-rate price: $196–$416.
Failed Contactor
Very CommonThe contactor is a relay switch that sends power to your compressor when the thermostat calls for cooling. A worn or burned contactor means the compressor never receives power — the indoor fan runs, air moves, but no cooling occurs.
BRADFORD'S FIX
Same-day repair in most cases. Flat-rate price: $232–$370.
Low Refrigerant (Freon Leak)
CommonRefrigerant is the substance that actually absorbs heat from your home's air. If your system has a leak, refrigerant levels drop and your AC loses the ability to cool. Signs include: ice on the refrigerant lines, hissing sounds near the outdoor unit, and gradually worsening cooling over days or weeks.
BRADFORD'S FIX
Bradford finds and repairs the leak first, then recharges. R-410A: $100/lb. R-22: $200/lb. A top-off without fixing the leak is money wasted.
Frozen Evaporator Coil
CommonThe evaporator coil (inside your air handler) can freeze solid when airflow is restricted or refrigerant is low. A frozen coil blocks all heat transfer — your AC runs but can't cool. You may notice ice on the refrigerant lines coming out of your indoor unit, or reduced airflow from vents.
✓ DIY FIX
Turn off the AC and run the fan only for 2–4 hours to thaw the coil. Do not run cooling until it's fully thawed — you can damage the compressor. Then check and replace your air filter.
BRADFORD'S FIX
After thawing, Bradford diagnoses the root cause: dirty filter, low refrigerant, or blocked drain. Price depends on root cause.
Dirty or Clogged Air Filter
Common — DIY FixA severely clogged filter restricts airflow so much that the system can't move enough air across the evaporator coil to cool your home. In Arizona's dusty environment, filters clog faster than in most states — especially near construction zones or unpaved roads.
✓ DIY FIX
Check and replace your 1" filter every 30–60 days in Arizona summers. Thicker 4–5" media filters last 6–12 months. A clean filter costs $5–$20 and takes 2 minutes to replace.
BRADFORD'S FIX
If a new filter doesn't resolve the issue within 30 minutes, call Bradford — there's likely a secondary cause.
Thermostat Set to 'Fan Only'
Easy Fix — Check FirstBefore calling anyone, verify your thermostat is set to COOL (not FAN or HEAT) and the temperature setpoint is at least 3–5 degrees below the current room temperature. This sounds obvious, but it's the first thing Bradford checks on every call.
✓ DIY FIX
Set thermostat to COOL, set temperature 5°F below current room temp, wait 5 minutes. If the outdoor unit doesn't start, you have a real problem.
BRADFORD'S FIX
If the thermostat settings are correct and the system still won't cool, call Bradford at (623) 624-6246.
Failed Compressor
Less Common — ExpensiveThe compressor is the heart of your AC system. When it fails, the system runs but produces zero cooling. Compressor failure is more common on systems over 10 years old, especially those that have run with low refrigerant for extended periods. Signs: outdoor unit runs but makes loud grinding or clanking sounds.
BRADFORD'S FIX
Compressor replacement costs $1,200–$2,800 depending on system size. On systems over 10 years old, Bradford will give you an honest repair vs. replace recommendation — sometimes a new system is the better investment.
CALL BRADFORD IMMEDIATELY IF...
Indoor temperature is above 85°F and rising
Elderly residents, young children, or pets are in the home
The outdoor unit is making grinding, clanking, or hissing sounds
You see ice on the refrigerant lines or indoor unit
The system trips the breaker when it tries to start
You smell burning from vents or the outdoor unit
The system ran with warm air for more than 2 hours
You replaced the filter and it still isn't cooling after 30 minutes
7 days a week · 7AM–7PM · $75/visit service call fee with approved repair
GET A SAME-DAY DIAGNOSIS
Bradford will call you back within minutes during business hours (7AM–7PM, 7 days).
Recent Work in Surprise
Bradford's most recent HVAC jobs in the Surprise area
Trane 17 SEER2 Two-Stage
3.5-ton split system, replaced 14-year-old Carrier unit
Blower Motor Replacement
No airflow, motor replaced, system back online same day
RunTru 15 SEER2 by Trane
3-ton split system, ground-level condenser, same-day install
Trane 17 SEER2 Heat Pump
2-ton split heat pump, replaced gas furnace system
Bradford serves Surprise and all West Valley cities — same-day service available
$59 A/C TUNE-UP & INSPECTION
Per unit · Full 20-point inspection · Serving Surprise, AZ
Or request a quote for any other service below