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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon453
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Frederick

Avatar for Green Heating & Air Conditioning LLC

Green Heating & Air Conditioning LLC

5.00(
108
)
Approved Pro

Green Heating & Air Conditioning LLC

5.00(
108
)
Approved Pro
Customers say: Quick response
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers
40 years of experience

I started Green Heating & Air Conditioning with one goal... to Save You Money. I can do that by lowering your heating and air conditioning bills with proper maintenance, repairing your heater or air conditioner right the first time, or installing a new more efficient heating and air conditioning system. And I'll do all that with affordable prices.

"perform maintenance and diagnose problems with oil furnace"

Michael S on January 2021

I started Green Heating & Air Conditioning with one goal... to Save You Money. I can do that by lowering your heating and air conditioning bills with proper maintenance, repairing your heater or air conditioner right the first time, or installing a new more efficient heating and air conditioning system. And I'll do all that with affordable prices.

"perform maintenance and diagnose problems with oil furnace"

Michael S on January 2021


"They were responsive and easy to get in touch with. They do what they say they are going to do."

Kristen J on December 2025

Here at Springfield Plumbing, LLC, we pride ourselves on commitment to our homeowners. With attention to detail and a genuine concern for their needs, you won't be disappointed or overcharged for our services. Call today and set the appointment!

"They were responsive and easy to get in touch with. They do what they say they are going to do."

Kristen J on December 2025


Avatar for Wentzel, LLC

Wentzel, LLC

4.93(
106
)
Approved Pro

Wentzel, LLC

4.93(
106
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 years of experience

Here at Wentzel Electric, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. We have over 15 years experience. No job is too big or too small for our experienced electrical team. Call today for a free estimate.

"I had a power failure. Similar to a brownout. I am by no means any type of handyman. I started getting nervous so I started to call electricians. I called Wentzels went to voicemail. Call many many other electrician no luck everyone had a wait of almost a week. Another company told me to call the utility to see if it was a problem on their end. While I was on hold Justin called me from Wentzels. Told me he listened to my message and that he had someone the next town over almost done with a job. Said he could be there in 30 minutes. Andy come out. Very polite, very professional, and very knowledgeable. He was able to find the root cause within the first 5 minutes of coming out. Turns out it wasnâ t a utility problem. It was a failure in the line between the meter and the receptacle to the house. It took Andy some time but he was able to make a full repair on the spot. A+ 100% if Andy come to your project you are going to be in good hands. Highly recommend the service."

Steve R on February 2021

Here at Wentzel Electric, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. We have over 15 years experience. No job is too big or too small for our experienced electrical team. Call today for a free estimate.

"I had a power failure. Similar to a brownout. I am by no means any type of handyman. I started getting nervous so I started to call electricians. I called Wentzels went to voicemail. Call many many other electrician no luck everyone had a wait of almost a week. Another company told me to call the utility to see if it was a problem on their end. While I was on hold Justin called me from Wentzels. Told me he listened to my message and that he had someone the next town over almost done with a job. Said he could be there in 30 minutes. Andy come out. Very polite, very professional, and very knowledgeable. He was able to find the root cause within the first 5 minutes of coming out. Turns out it wasnâ t a utility problem. It was a failure in the line between the meter and the receptacle to the house. It took Andy some time but he was able to make a full repair on the spot. A+ 100% if Andy come to your project you are going to be in good hands. Highly recommend the service."

Steve R on February 2021


"Travis checked the inside of my air conditioner for me and explained all the details of what needed to be done. He was very thorough. After what he explained to me what I had to spend on fixing certain wires, etc. in it, it would be about the same price as a new air conditioner. I chose a new air conditioner.Travis was the best! He listened and explained everything that needed to be done. He also listened to my needs. Thank you Travis, great job!"

MARYANN T on June 2025

At Rohrer's One Hour Heating and Air Conditioning, customer satisfaction is our first priority. We have over 50 years experience in providing the best quality products and service. Call today to find out what makes us the best! Remember, "If there's any delay, it's you we pay!"

"Travis checked the inside of my air conditioner for me and explained all the details of what needed to be done. He was very thorough. After what he explained to me what I had to spend on fixing certain wires, etc. in it, it would be about the same price as a new air conditioner. I chose a new air conditioner.Travis was the best! He listened and explained everything that needed to be done. He also listened to my needs. Thank you Travis, great job!"

MARYANN T on June 2025


Avatar for H L Bowman

H L Bowman

4.78(
378
)
Approved Pro

H L Bowman

4.78(
378
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
79 years of experience

HL Bowman has been in the same location for 38 years and owned by the same family for over 65 years. HL Bowman is a non commission based company. HL Bowman employees will never upsell you a product you don't need. Dennis and Bryan Enders and his family have deep roots in the Harrisburg community. After 65 years Dennis and family stay committed to giving the community the best possible service and product to fit their needs. HL Bowman has won Angie's List super service award every year.

"Yes, one day install conversion from tank electric to tankless gas with water softener "

Ed Z on December 2025

HL Bowman has been in the same location for 38 years and owned by the same family for over 65 years. HL Bowman is a non commission based company. HL Bowman employees will never upsell you a product you don't need. Dennis and Bryan Enders and his family have deep roots in the Harrisburg community. After 65 years Dennis and family stay committed to giving the community the best possible service and product to fit their needs. HL Bowman has won Angie's List super service award every year.

"Yes, one day install conversion from tank electric to tankless gas with water softener "

Ed Z on December 2025


Avatar for J.P. Works, LLC

J.P. Works, LLC

4.93(
47
)
Approved Pro

J.P. Works, LLC

4.93(
47
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
12 years of experience

J.P. WORKS, LLC is the best choice for all HVAC needs you may have. We specialize in replacements of all types of heating and cooling system.With over 35 years experience. We work on all types of units. Call us today! We look forward to working with you, for years to come.

"They did a good job. "

GERALD P on November 2025

J.P. WORKS, LLC is the best choice for all HVAC needs you may have. We specialize in replacements of all types of heating and cooling system.With over 35 years experience. We work on all types of units. Call us today! We look forward to working with you, for years to come.

"They did a good job. "

GERALD P on November 2025


Avatar for New Energy Solutions

New Energy Solutions

4.85(
169
)
Approved Pro

New Energy Solutions

4.85(
169
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
30 years of experience

New Energy Solutions, welcomes you to experience prompt service that will exceed your greatest expectations. Trane heating and air conditioning units are one of the highest rated, energy efficient systems on the market. Our exquisite workmanship and quality craftsmanship will earn your trust for a lifetime. You can count on us to work with you every step of the way. Call me today you'll be pleased you did. Thank you

"n/a"

Steve N on January 2025

New Energy Solutions, welcomes you to experience prompt service that will exceed your greatest expectations. Trane heating and air conditioning units are one of the highest rated, energy efficient systems on the market. Our exquisite workmanship and quality craftsmanship will earn your trust for a lifetime. You can count on us to work with you every step of the way. Call me today you'll be pleased you did. Thank you

"n/a"

Steve N on January 2025


Avatar for PerfecTemp Inc.

PerfecTemp Inc.

4.96(
12
)
Approved Pro

PerfecTemp Inc.

4.96(
12
)
Approved Pro
Customers say: Quality work
25 years of experience
Free onsite estimate

PerfecTemp is a leading HVAC company servicing the Greater Lehigh Valley and beyond. We guarantee we have the solution you need at the price you want and the service standard you deserve. PerfecTemp is fully licensed and insured. We guarantee 100% customer satisfaction with every project

"Explained everything that was being done and isolated the problem rather quickly. Matt was professional and effective. Highly recommend their services."

Chris Y on June 2025

PerfecTemp is a leading HVAC company servicing the Greater Lehigh Valley and beyond. We guarantee we have the solution you need at the price you want and the service standard you deserve. PerfecTemp is fully licensed and insured. We guarantee 100% customer satisfaction with every project

"Explained everything that was being done and isolated the problem rather quickly. Matt was professional and effective. Highly recommend their services."

Chris Y on June 2025


Avatar for Christopher J. Kollar Electrical Contractor

Christopher J. Kollar Electrical Contractor

4.95(
19
)
Approved Pro

Christopher J. Kollar Electrical Contractor

4.95(
19
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
26 years of experience

Welcome to Christopher J. Kollar Electrical Contractor, LLC. We have been proudly serving the local area since 1999. Call today to schedule an appointment for fast, quality, and reliable service! You will not regret your decision to work with our company! We also provide same day or emergency services for residential and commercial clients.

"Chris was very helpful considerate. He went above and beyond. I'll definitely recommend chris on any electrical problems."

Alfred J on May 2020

Welcome to Christopher J. Kollar Electrical Contractor, LLC. We have been proudly serving the local area since 1999. Call today to schedule an appointment for fast, quality, and reliable service! You will not regret your decision to work with our company! We also provide same day or emergency services for residential and commercial clients.

"Chris was very helpful considerate. He went above and beyond. I'll definitely recommend chris on any electrical problems."

Alfred J on May 2020


Avatar for Petro Home Services

Petro Home Services

4.55(
92
)
Approved Pro

Petro Home Services

4.55(
92
)
Approved Pro
Customers say: True professional
122 years of experience
Emergency services offered

With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!

"The plumber was berybeasybto deal with and very experienced. He did a great job."

Gerald M on December 2025

With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!

"The plumber was berybeasybto deal with and very experienced. He did a great job."

Gerald M on December 2025

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Heating and Air Conditioning questions, answered by experts

If you have central air conditioning, it’s fine to run your AC all day if that’s what you want—as long as the AC unit is in good condition. But if your AC runs constantly when you don’t want it to, there may be a problem with your system (like the ones we’ve mentioned above). Window AC units and wall air conditioners aren’t as powerful as central AC, so you should only run those kinds of air conditioners for eight to 12 hours at a time.

Vents may blow air even though the air conditioning system is off because of the pressure difference between indoor and outdoor air or drafts from leaky ducts. Check for leaks or drafts in the ductwork or around windows and doors.

No, it’s not normal for AC vents to drip condensation. A sweating AC vent is a sign of something wrong and can lead to issues like air duct rust or mold growth. Your HVAC unit might not be working efficiently because of a dirty filter or clogged ducts. Alternatively, your ductwork might not have adequate insulation, which allows the cool air in the ducts to meet the humid air outside, causing condensation. 

Clean the filter regularly, inspect seals, and store the unit properly during the off-season.

When a compressor gets overheated in central air systems or heat pumps, it can still cool your home for a while until it eventually gives out. If the compressor is chronically overheated and no one addresses the root cause, it will create an incredibly expensive problem when your entire HVAC system breaks down and stops working altogether.

The Frederick, PA homeowners’ guide to heating and air conditioning services

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

What do you need done? We’ll find top pros.
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