How often do I need to service my HVAC system?

• <div><p>You need to service an HVAC system about twice per year, with a service including an inspection and basic maintenance. It’s best to schedule maintenance in the spring (after the furnace has been running and before the AC kicks on) and in the fall (after the AC worked hard all summer and before winter’s first chill arrives). </p><p>Regular HVAC services will keep the system working as efficiently as possible, saving you money on utilities and larger repairs. <a href="https://www.angi.com/articles/ac-service-cost.htm">HVAC maintenance costs</a> around $250 per visit, while bigger repairs from forgotten upkeep could cost thousands.</p></div>

Do you need backup heat with geothermal?

• <div><p>If a geothermal heat pump is installed correctly, then you shouldn’t have to worry about having a backup heat source such as a <a href="https://www.angi.com/articles/furnace-and-heating-basics.htm">furnace</a> or oil boiler. However, there are geothermal systems installed that include a backup in case the heat pump fails due to extreme cold. This is simply a backup heat pump you’ll likely never need and not an alternative heat source.</p></div>

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TRUSTED BY MILILANI, HI HOMEOWNERS

4.2
Average homeowner rating
10
Verified heating oil services reviews

Verified Reviews for Heating Oil Service pros in Mililani, HI

*The Angi rating for Heating Oil Service companies in Mililani, HI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating Oil Service needs.

*The HomeAdvisor rating for Heating Oil Service companies in Mililani, HI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating Oil Service needs.

Last update on December 07, 2025

Reviewed in May 2020
Excellent. Wanted an inspection to test for noisy pipes. They reduced water pressure and also checked the expansion tank on the water heater. Problems fixed in a few minutes.
Joseph plumbing & drain
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Reviewed in December 2015
Our water heater pressure relief valve was leaking and flooded the laundry room and part of the garage. We called A-1 Plumbing in the morning and the plumber arrived that afternoon. Kevin drained the water heater and replaced the pressure relief valve. When he tested the new valve, it also...
A-1 Budget Plumbing
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Reviewed in June 2014
He replaced the garage door opener, oiled and tightened bolts on the door. It works smoothly and quietly now. We are pleased with the work.
Alliance Overhead Doors
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Reviewed in May 2014
He's great but his assistant is horrible - messed up so he had to come back. Not to mention the assistant spilled machine oil all over our lawn and killed a large patch of mature ground cover/grass. Though he fixed the assistant's mistake, we won't be calling them back because of the negative...
All In One Home Repairs
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Reviewed in March 2014
Coastal tanks met all agreement discussions perfectly. Due to busy schedules, most details were discussed over the phone. His crew arrived on time. Got to work. And, finished on time. They did an excellent clean-up effort. A hard working crew. We switched from heating oil to natural gas....
Coastal Tanks, Ltd,
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Reviewed in November 2013
JR's an excellent small business. Very attentive and provides better estimates than the larger companies. He has "Andy," who's superb at ducting work in an older house. Also, his piping crew remedied unique older house issues without any commotion. Good guys working on this team. If you...
Newbern Mechanical Company Inc
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Reviewed in November 2010
Sid came to my house early in the morning to check what type of heater I needed. He came back that same afternoon and installed the water heater in a timely manner. Very friendly and answered all my concerns. He called the next day to check if everything was o.k. had a leak in the washroom pipes...
R A L Plumbing
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Reviewed in October 2007
We took a car to them for inspection before purchase and they found oil leaks and saved us from purchasing that car. Scottie is just a gem! He's very bright and on top of things. He's a fast-thinker and is super to work with. He even took me back into the garage to show me what was going on with...
SCOTTY'S AUTOMOTIVE
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Find Heating oil pros in Mililani

Continental Mechanical Services LLC

New on AngiNew on Angi

•Approved Pro

Continental Mechanical Services LLC

New on AngiNew on Angi

•Approved Pro

253 local quotes requested

10 years of experience

With decades of experience in commercial and industrial projects and services, our company is proud to extend our top-tier mechanical services to residential clients. We specialize in plumbing solutions and backflow inspections as well as air conditioning installation, maintenance, and repair. Our expertise also encompasses HVAC controls, fire protection systems, commercial refrigeration systems and sheet metal work, ensuring comprehensive solutions for your home's needs. Our dedicated team is committed to delivering professional, efficient, and reliable service to enhance the comfort and safety of your residence.?

Handymen Oahu

5.00(

)

•Approved Pro

Handymen Oahu

5.00(

)

•Approved Pro

Customers say: Quick response

164 local quotes requested

7 years of experience

At Handymen Oahu we are experienced professionals capable of tackling repairs and renovations over a wide variety of trades. As Hawaii's hardest workers there is nothing more important to us than doing a good job, on time and with a positive attitude. We have over 5 years of experience supporting Hawaii's homeowners and are excited to work with you on your next project.

"Replacement air conditioners in guest rooms. Very thorough from start to completion. Removed all trash and older equipment. I’m looking forward to seeing more projects in the coming weeks! Reasonable prices and clean. I have been through a lot of negative experiences and this has been a huge relief in restoring confidence and trust again!"

Jeff C on October 2025

"Replacement air conditioners in guest rooms. Very thorough from start to completion. Removed all trash and older equipment. I’m looking forward to seeing more projects in the coming weeks! Reasonable prices and clean. I have been through a lot of negative experiences and this has been a huge relief in restoring confidence and trust again!"

Jeff C on October 2025

Heating Oil questions, answered by experts

There are several common types of HVAC systems that you may have, including split systems, hybrid HVAC, duct-free systems, packaged heating and air, geothermal heating, or even portable units for heating or cooling. If you aren’t sure which type is in your home or are looking to install something different, you should consult an HVAC pro to determine which option is right for your heating and cooling needs.

NATE-certified technicians may charge slightly higher service fees compared to non-certified technicians. This is because NATE certification signifies a higher level of expertise and professionalism, often leading to more efficient and effective HVAC repairs and installations. While the upfront cost may be marginally higher, NATE-certified technicians can potentially save you money in the long run by reducing energy consumption, preventing frequent breakdowns, and extending the life span of your HVAC system. When looking for a local HVAC company to hire, it never hurts to ask about NATE certifications.

You need to service an HVAC system about twice per year, with a service including an inspection and basic maintenance. It’s best to schedule maintenance in the spring (after the furnace has been running and before the AC kicks on) and in the fall (after the AC worked hard all summer and before winter’s first chill arrives).

Regular HVAC services will keep the system working as efficiently as possible, saving you money on utilities and larger repairs. HVAC maintenance costs around $250 per visit, while bigger repairs from forgotten upkeep could cost thousands.

Regular inspections, loop flushing, and checking heat exchangers help extend system lifespan.

If a geothermal heat pump is installed correctly, then you shouldn’t have to worry about having a backup heat source such as a furnace or oil boiler. However, there are geothermal systems installed that include a backup in case the heat pump fails due to extreme cold. This is simply a backup heat pump you’ll likely never need and not an alternative heat source.

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