*The Angi rating for Heating And Air Conditioning Service companies in Frederick, PA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Frederick, PA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on January 07, 2026
Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Fantastic. In and out in within 2 hours. Cost $15,000 less than another Angie's List HVAC service person quoted me."
+6
Serving Frederick, PA and surrounding areas
Approved
In business since 2013
Free estimates
Warranties offered
"Needed to replace a 40 year old gas boiler. JP had the best price for a high efficiency compared to 3 other quotes. Jim (owner) was in and out of the project but sensed he was on top of it. He was even able to save us a bunch of space by repositioning the boiler location. Definitely going to use these guys for my HVAC and plumbing needs going forward."
Serving Frederick, PA and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"I met with about twelve hvac contractors as my project was a large job that included two systems and duct work. I met Erik last and he was the most straightforward person and did not try to up sell me. He painted the picture of what he would do and was confident in his proposal. When the work started it was smooth and detailed. Erik and his crew answered my many questions which helped me feel more confident. Overall a wonderful experience and value for your money. Erik included many items that other companies did not which helped the end product look and function better. Thank you!"
Serving Frederick, PA and surrounding areas
Approved
Super Service Award Winner
In business since 1959
Free estimates
Emergency services offered
"Steve A., the sales staff, and the two techs who installed my HVAC system provided excellent service. They were courteous, competent, and answered my questions. I would recommend Rohrer's One Hour!"
+16
Serving Frederick, PA and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Arrived on time and checked my existing HVAC equipment. Will use them again"
+18
Serving Frederick, PA and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"It was a superb experience. From the visit by Bruce the sales representative to the installation day to the follow-up from Petro, every single person we interacted with was helpful and professional. When Bruce arrived to do the assessment, we spent time going over the heating needs in the house. After a thorough inspection and measurement of the house, we sat down. He showed me a few options, all of which were going to provide good service. I ordered a unit at the end of that meeting. The installation day was just terrific- the entire work crew that showed up were everything I would hope to find: Upbeat, informative, hard-working, focused. The job was finished before end of day as promised. The heater room is now immaculate, with new piping and a new heater. It was like watching a pit crew at a NASCAR race. Everyone had their tasks, they moved carefully but quickly. The materials were all laid out in order, etc. Just a totally professional approach to their work. The crew boss answered any questions I had. The follow-up for a normal inspection of the furnace chimney was scheduled the day after the installation. I’ve gotten calls to insure we are satisfied with the work. Satisfied barely covers it- I am pleased to write this kind of review. Without hesitation I will recommend Petro to friends and family throughout the Philly area. Peter A. Elkins Park"
Serving Frederick, PA and surrounding areas
Approved
In business since 2013
Credit card accepted
Offers commercial services
"Our 17 year old central air conditioning went out at the start of a heat wave. I called Arctic Fire on a Sunday morning. Alex returned my call that afternoon and came out the next day around noon and quickly diagnosed the problem and had our old unit running in about half an hour. In conversation with Alex I discussed the possibility of replacing my 17 year old unit which had been a problem with 3 previous service calls in the last year. Within a day he sent me an estimate which was very competitive and reasonable. Within 2 weeks he replaced both my compressor and air handler in a very hot attic. His team was very professional and completed the job in about 5 hours. Even in very hot weather his team remained focused and answered all my questions and concerns. He did not leave until everything was running and operating correctly. I would highly recommend Alex and Arctic Fire for any of your HVAC needs."
+2
Serving Frederick, PA and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"Matt was prompt and gave his professional advice at no charge. In the end we donâ t need to install a centralized dehumidifier, but because of his honestly and level of experience we have decided to use this company for all of our future HVAC needs"
Serving Frederick, PA and surrounding areas
Approved
In business since 2018
Free estimates
Warranties offered
"HVAC Gurus were amazing. Extremely flexible in work with and around other trades also busy on the complete renovation. Their technician Joe did such a good job; he designed and planned the HVAC retro-fit of central heat and air into my 100 year old house to be transparent. Then Joe did the work and delivered flawlessly. Great value for money, below other bids I got. Iâ m in the trades and Iâ m telling you, these guys are top notch."
Serving Frederick, PA and surrounding areas
Approved
In business since 1946
Free estimates
Emergency services offered
"Marshall does it all, heating oil, HVAC, plumbing etc. Theyâ  re great!"
+2
Knowing how long your existing HVAC units can last is essential to determine if you need a repair or replacement. Typically, most modern air conditioning units can last between 15 to 20 years, and most furnaces can work properly for 15 to 30 years. If your HVAC system is on the older side and you decide to replace one unit, it might make sense to replace both simultaneously to save on costs and future hassle.
While different HVAC contractors might offer higher or lower prices than competitors, the best time to replace your HVAC system is when customer demand is low. The beginning of summer and the beginning of winter bring the most demand for HVAC systems, so if you can, consider replacing your HVAC units in the early spring or fall. Many HVAC companies offer special off-season coupons that help lower the overall cost.
The average cost to hire an HVAC contractor is between $50 and $150 per hour if charging hourly. However, some HVAC contractors will charge a flat fee by the type of service they are performing—for example, an inspection can cost between $150 to $500. Keep in mind that emergency repairs—which are made after business hours or around major holidays—generally cost more than scheduled repairs.
Yes, most states require HVAC technicians to be certified, and for good reason. Hiring an unlicensed HVAC technician could lead to poor quality work, costly future expenses, and potential code violations.
As you browse our pro listings, take note of the “Angi Approved” badge. Angi Approved businesses meet our standards for certification which include:
The owner, principal, or relevant manager passed a criminal background check
Required to have applicable state and local licenses
Maintain an average star rating of 3.0 or better on our network, if they have at least one review
Paying to advertise their services
Meeting any other eligibility criteria required by Angi
Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.
The average cost of HVAC repairs is around $350. However, that price can be as low as $100 or as high as $2,000 or more, depending on the repair. For example, replacing a capacitor is a relatively inexpensive repair, ranging from $100 to $500. However, a compressor repair is a more expensive repair, ranging from $750 to $2,000.
From average costs to expert advice, get all the answers you need to get your job done.
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