Is Your AC Not Blowing Cold Air? Simple Troubleshooting Steps for Red Deer Summers
Not getting cool air? Call McMullen’s for same-day AC repair in Red Deer: +1 (403) 342-1155
When the hot Red Deer summer heat kicks in and your air conditioner suddenly stops blowing cold air, panic can set in fast. Before you start to sweat it, there are a few common (and fixable) reasons your AC might be underperforming.
This guide walks you through the most likely culprits behind a warm AC system and what you can do before calling in the pros.
1. Check Your Thermostat Settings First
It might sound simple, but it’s one of the most overlooked causes.
- Make sure your thermostat is set to cool and not just fan
- Double-check the temperature setting and mode
- If you’ve recently experienced a power outage, your thermostat may have reset to default
Tip: If your thermostat runs on batteries, low power can cause inconsistent behaviour. Try replacing them.
2. Inspect and Replace Your Air Filter
A clogged or dirty air filter can restrict airflow and cause your system to blow warm or weak air.
- Check your filter monthly during peak cooling season
- Replace it if it looks dusty or grey
Bonus: Clean filters improve indoor air quality and help your AC run more efficiently.
3. Check for Ice Build-Up on the Coils
Yes, ice on your AC can stop it from cooling.
- Turn off your system and inspect the indoor evaporator coils and the outdoor unit for frost or ice
- Let it thaw completely before restarting
- Dirty filters or low refrigerant can cause freezing
If this keeps happening, you likely need professional servicing.
4. Inspect the Outdoor Unit (Condenser)
Your AC’s outdoor unit needs proper airflow to work effectively.
- Make sure the area around your condenser is free of dirt, leaves, and grass clippings
- If the fan isn’t spinning or the unit sounds unusual, shut it off and call for service
Warning: Never try to repair a condenser motor yourself. This component deals with high voltage.
5. Look for Signs of Low Refrigerant
Your AC needs refrigerant to absorb heat from your home. If it’s low, it can’t cool properly.
- Signs of a refrigerant issue include hissing sounds, ice on the lines, or long cooling cycles with little effect
Important: Low refrigerant is often a sign of a leak. This is not a DIY fix and requires certified handling.
6. Circuit Breaker Issues or Power Problems
Sometimes your AC might not be running at all due to a tripped breaker or a blown fuse.
- Check your electrical panel and reset any tripped breakers
- If the breaker keeps tripping, call an HVAC professional immediately
Don’t Forget Regular AC Tune-Ups
Many issues that lead to poor cooling can be prevented with annual AC maintenance. From checking refrigerant levels to inspecting your coils and electrical connections, McMullen’s AC tune-up services keep your system running like it should.
When It’s Time to Call McMullen’s
If you’ve tried these troubleshooting steps and your AC still isn’t blowing cold air, don’t sweat it. McMullen’s offers fast, reliable AC repair services in Red Deer and throughout Central Alberta.
Our certified technicians can diagnose the issue and get your home feeling comfortable again, often the same day you call.
Call now: +1 (403) 342-1155
