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Find Air conditioning pros in Mount Vernon

Avatar for Pass One Hour Heating & Air Conditioning
Pass One Hour Heating & Air Conditioning
5.0(
7
)

Serving Mount Vernon, IL and surrounding areas

Approved

In business since 1971

Free estimates

Emergency services offered

"Had my spring maintenance done and couldn’t be happier with the service. The technician was on time, professional, and took the time to explain everything clearly they also swapped out my nest thermostat for an ecobee and got it set up. Everything is running great and I highly recommend Pass One Hour."
New Heat & Cooling system
New Heat & Cooling system
New Heat & Cooling system
New Heat & Cooling system
New Heat & Cooling system

+18

12 neighbors recently requested a quote
Avatar for Ohana Heating & Air
Ohana Heating & Air
4.4(
33
)

Serving Mount Vernon, IL and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"Had our old furnace and air conditioning system replaced with a new system. Shane is very knowledgeable and was very thorough in making sure everything was right. Was very patient in answering our questions. Properly sized our new unit so our air flow is much improved over the old system. From the first call quickly responding to our request for a quote from Home Advisor, to a follow-up visit to make sure we were well-pleased with the install, Shane and Brock were very professional and performed excellent work."
Office Units
Court House Mini
VRF
Mechanics shop
Garage

+1

Response time1 day
Recommended by92%of homeowners
Avatar for Greathouse Mechanical, LLC
Greathouse Mechanical, LLC
5.0(
10
)

Serving Mount Vernon, IL and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"When we called they returned the message within 10 minutes. Then they came out the next day. Chris was nice and explained everything. Everything was done within a few days. Would recommend."
Response time12 hrs
Recommended by100%of homeowners
Avatar for Rardin Plumbing Heating & A/C
Rardin Plumbing Heating & A/C
4.6(
11
)

Serving Mount Vernon, IL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Excellent service.  Oscar and his crew go far and above what is necessary to fix or replace plumbing.  They are very conscientious, courteous and respectful.  They are also very considerate of your property, taking measures to insure that floors are kept clean and all debris is removed when they leave.  I will hire Rardin Plumbing and Heating again, and I highly recommend them.
"
Recommended by100%of homeowners
Wabash Electric Heating & Cooling LLC
5.0(
7
)

Serving Mount Vernon, IL and surrounding areas

In business since 1970

Free estimates

Emergency services offered

"Got my ductwork cleaned out and replace 23 outlet covers. All done in record time. Very friendly and professional and explained the whole process as he went and showed me all the junk that came out of my ducts. Cleaned up as he went along and couldn't even tell he had been here except that there's no dust floating around in the air now."
Response time8 hrs
Recommended by100%of homeowners
Showing 1-10 of 41

FAQs for air conditioning projects in Mount Vernon, IL

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Mount Vernon, IL homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.