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Avatar for HVAC Doctor LLC
HVAC Doctor LLC
4.9(
28
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Andover, MN and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"vitaly and his crew did a very good job of removing a big old furnace and installing a new furnace and air conditioner. They did it in a timely manner at a very fair price. explained everything very well. left the place cleaner than when they started. Highly recommend Hvac Doctor."
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+137

Response time1 day
28 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Hoffman Cooling and Heating
Hoffman Cooling and Heating
4.7(
2,072
)
Central A/C - Install

Serving Andover, MN and surrounding areas

Approved

Super Service Award Winner

In business since 1957

Free estimates

Emergency services offered

"They did very high-quality work! They replaced my furnace and air conditioning. They did a very highly professional job. They did it in one day, They replaced a Montgomery wards furnace of 53 years and air-conditioning, the new furnace and the air-conditioning work very well. A lot less money to operate, I went from a 60% or 96%."
 Twins!!
 Another set of twins!!
 Oil to gas conversion, took out a monster!!
Jim's new car
New install van!!

+5

1595 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Air Knights Heating & Cooling, Inc.
Air Knights Heating & Cooling, Inc.
3.9(
522
)
Central A/C - Service or Repair

Serving Andover, MN and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"I spent a long time looking for an accommodating and knowledgeable HVAC professional and Air Knight fulfilled all my criteria for a great service company. Phillip came to me and was quickly able to assess and deal with my air conditioning situation - believe me I contacted a lot of people and no one was as responsive as he was."
Furnace Installation in Burnsville MN
Response time8 hrs
9 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Home Energy Center Heating and Cooling
Home Energy Center Heating and Cooling
4.4(
47
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Andover, MN and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"First, this company has handled all of my heating needs/problems since 1986 when they replaced a 58 year old gravity furnace with a high efficiency forced air system. I was not always pleased with this first furnace, but the company techs always gave me good service and advice. I needed to replace this furnace due to a flooded basement that left the unit under water for 6 hours and it was 23 years old. I looked to Home Energy Center (HEC) because of the good service they had provided over the years, but it was their job to lose - I had some questions about the old furnace. I called to make an appointment for an estimate and Kevin came out on the date and time of my choosing (at that time as late as 7pm and Sat. available). Kevin knew about my old furnace and told me they had stopped installing that model a few years after my purchase - they had found something better (I believe mine was an early high efficiency model -92%), I was impressed that he didn't try to sidestep any of my criticisms and presented me with what I thought was a good heating plant. Kevin said it's normally a 2 week wait for the installation but they had a cancellation the following Monday (4 days) and if I opted for that date they would deduct $250. He already had my business so I thought this was a nice gesture. That Monday the 2 installers came at 7am sharp and got right on the job. They said it would take about 8 hours so when I came home at 330pm I was surprised to find they had finished up and left They did leave all the manuals and instructions for operation. HEC provides what they call a "happiness check" where a company rep makes a return visit to check out and familiarize the homeowner with the system. I called Joyce and set up this appointment for a week later and Steve arrived at the appointed time. He had a checklist of items to go through with me and answered all my questions. He again covered all the warranty information and said I would receive materials in the mail to apply for an energy rebate and the Federal Energy Tax Credit (2010 exp). I did get these documents as promised along with excellent instructions in dealing with them (thanks Joyce). Granted I have only had this furnace for 2 months but so far I have no complaints and the house is warm. I would certainly use HEC again and will for future service/maintenance calls."
16 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Aquarius Home Services
Aquarius Home Services
4.6(
260
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Andover, MN and surrounding areas

Approved

Super Service Award Winner

In business since 1987

Free estimates

Emergency services offered

"Riley was the technician who serviced my air conditioner yesterday. Riley always kept me informed on the progress of the work he was doing and before leaving THOROUGHLY explained the condition of my air conditioner and what I can do to extend its life. Fortunately my air conditioner, even though it’s 11 years old, is in great condition and I plan on doing things to prolong its life. Overall I would give Riley a rating of 10. He is an exceptional technician, knows his job, explains things well, and personable. The cost today was $17 for a replacement filter."
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Response time12 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Kody's Home Services LLC
Kody's Home Services LLC
5.0(
13
)
Central A/C - InstallCentral A/C - Service or RepairCentral Humidifier - Repair or Service

Serving Andover, MN and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Kody was quick at troubleshooting and finding out issue on our air conditioner gave us options on repairs and replacement and within 24 hours we have a new air conditioner installed and running like a dream on this hot summer day!"
Old air exchanger
New air exchanger
New heating system
Old heating system
Old heating system

+3

Response time8 hrs
Response rate89%
3 neighbors recently requested a quote
Avatar for Mallard Mechanical
Mallard Mechanical
5.0(
11
)
Central A/C - Service or RepairCentral Air Cleaner - Repair or ServiceCentral Humidifier - Repair or Service

Serving Andover, MN and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"I would recommend Preston and Mallard Mechanical to anybody in the area looking to buy a new furnace/AC, or even just general HVAC maintenance. We closed on our house on a Friday with the AC not working and the furnace on its way out. We called Mallard Mechanical that morning and the equipment was ordered that same day and the install scheduled for the following Tuesday. The day of the install Preston was on site right on time and got our old AC and furnace torn out and the new system put in all in the same day. He was extremely professional and kept a VERY clean work site. He made sure to go over everything about the new system with my wife and I and even took care of setting up the city inspection for the new system. Last but absolutely not least, Mallard Mechanical's prices are extremely fair and I cannot imagine finding better service anywhere else for as good of a price as we got with Mallard Mechanical. Thank you again to Preston and Mallard Mechanical!"
Response time3 hrs
Recommended by88%of homeowners
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FAQs for air conditioning projects in Andover, MN

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 Andover, MN homeowners’ guide to air conditioning services

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