Frequently Asked Questions

Follow these steps to trouble shoot AC:

• Make sure cooling is turned on in the thermostat
• Check to see if the furnace blower is running (air coming out of the vents)
• Check to see if the indoor AC coil (on top of the furnace) is leaking or freezing
• Check to see if the outdoor condensing unit is running

Based on your troubleshooting, read our other answers below.

Freezing is caused by a malfunctioning outdoor AC unit or indoor coil.

• Change the air filter. The most common cause of freezing is a dirty air filter.
• If your filter was dirty, de-thaw your system by turning cooling off in your thermostat & fan back on for 12-24 hours after changing it.
• If a filter change & de-thawing didn’t do the trick, your system has to be professionaly inspected
• Freezing is typically caused by low refrigerant, leaks in the refrigerant loop, malfunctioning compressor & more.

Freezing is caused by a malfunctioning outdoor AC unit or indoor coil.

• Change the air filter. The most common cause of freezing is a dirty air filter.
• If your filter was dirty, de-thaw your system by turning cooling off in your thermostat & fan back on for 12-24 hours after changing it.
• If a filter change & de-thawing didn’t do the trick, your system has to be professionaly inspected
• Freezing is typically caused by low refrigerant, leaks in the refrigerant loop, malfunctioning compressor & more.

This means your furnace is not currently running. Your AC uses your furnace’s blower.

Your system has to be professionally inspected & diagnosed.

• Check the AC breaker in your electrical panel
• Check to see if there’s any noises coming from the unit when it’s on

If the outdoor unit is not turning on, your system has to be professionally diagnosed.

Capacitors, contacters & melted wiring are common isues that happen due to:

• power outages
• power surge
• dirty filter
• overworking of the system.

• Is the hum different than usual?

  • Humming or buzzing may be a sign of the compressor overworking or getting closed to failure
  • Loud buzzes & fan buzzes are typically due to age. If it gets worse overtime, the compressor is failing.
  • Minor humming is alright, but if there’s a change in the sound profile of the unit, you may want to have it inspected.

The R22 refrigeration systems are being phased out worldwide because of their harmful effects on the ozone layer.

The US environmental Agency (EPA) has set January 1st , 2021 as the date when R22 is banned from production and importation in the United States. R22 Refrigerant is 4-8 times the price of normal refrigerant (R410) due to this restriction.

Leaking R22 systems will not be recharged by UniColorado as:

• • Leaks get bigger over time a
  • All the refrigerant will escape
  • Sealants do not work for more than a couple of months
  • Opening the unit to braze leaks is cost-prohibitive and often not successful.