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 JANESVILLE, WI HOMEOWNERS

4.8
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72
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Verified Reviews for Heating Oil Service pros in Janesville, WI

*The Angi rating for Heating Oil Service companies in Janesville, WI 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 Janesville, WI 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 October 16, 2025

Reviewed in January 2025
The folks at Current Flow did an excellent job with our heat pump water heater installation. Every step of the process went very smoothly, and we couldn't be more happy with their customer service, quality of their work and fair pricing.
Current Flow Plumbing
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Reviewed in July 2016
Our central air unit went out early evening and it was during one of the hottest, most humid days we've had this summer. Needless to say our home was very hot within less than an hour. Most businesses are closed by the time we noticed it had gone out so I called J.C Heating and Cooling first...
J.C. Heating and Cooling, Inc.
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Reviewed in June 2014
This dealer is actually my favorite place to go for an oil change. The service techs always go above and beyond in being responsive and helpful. They had extra floor mats one time and gave them to me when they realized I didn't have any. They also cleaned up a mess from a bad oil change at...
HESSER HYUNDAI
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Reviewed in June 2014
Many members of my family (3 women) use KW Auto. Personally I have use them for everything from oil changes to brakes, tune ups, oil leaks and engine repairs. I have had them work on 4 different vehicles I've owned and it's alway been good work. They give fair prices and now that we are...
K W TRUCK AUTO REPAIR
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Reviewed in April 2014
Showed up on time, responded within two hours of being called, worked quickly to restore heat, very professional, didn't try to perform any additional work to increase bill. Will use again when having heating/AC problems. Would highly recommend.
DUALL HEATING & COOLING INC
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Reviewed in September 2013
Great place to get oil changed - always fast and reliable. They check and top off all fluids, check and refill tires, and inspect & replace air filters when necessary.
Kwik Lube
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Reviewed in January 2013
Split system at cottage has had freon leak since installation. They could not find leak and claim this is NORMAL. At each maintenance visit they have added freon. This leak has cused the system to run too much and drive up the utility bill. I had a new company come out in Dec 2012 and they...
Smarr Heating & Air Conditioning LLC
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Reviewed in July 2011
We have been using this companies service since they opened. Previously we had no problems, the prices were good, the work was good, and the customer service was great. Recently, there has been a new owner and we have noticed some changes. I went in for an oil change in the beginning of June and...
Delavan Automotive & Tire Center
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Find Heating oil pros in Janesville

ThermaTek Heating and Air

ThermaTek Heating and Air

Customers say: Quick response

Recommended by 90% of Angi customers

24 local quotes requested

Welcome to ThermaTek Heating and Air. We are excited to exceed your expectations! As industry professionals, we will handle all your needs with the high-quality expertise and attention to detail your home or business deserves. We offer competitive prices and customer satisfaction is our number one priority. Call us today for your free estimate!

"The tech was very nice and professional. He had to order a part and came back the next day to finish the repair. He walked me through each step and provided tips for future maintenance. "

Teresa R on October 2025

"The tech was very nice and professional. He had to order a part and came back the next day to finish the repair. He walked me through each step and provided tips for future maintenance. "

Teresa R on October 2025

Southport Home Services

Southport Home Services

117 local quotes requested

20 years of experience

At Southport Home Services, we're A+ rated by the BBB. Our technicians are NATE certified to meet national standards of excellence, and we're a Carrier® Factory Authorized Dealer, recently cited as the top medium-sized business to work for by the Milwaukee Journal Sentinel. We treat our team well and hold them to high professional standards. Our up front, transparent pricing, great customer service, and honesty in our business practices make us the plumbing and HVAC company that you'll feel good working with on a regular basis, with 100% satisfaction guaranteed.

Rock Valley Services, Inc.

928 Todd Drive, Suite 2

4.94(

)

•Approved Pro

Rock Valley Services, Inc.

928 Todd Drive, Suite 2

4.94(

)

•Approved Pro

Customers say: Quick response

Recommended by 100% of Angi customers

22 years of experience

Rock Valley Services, Inc., is a locally owned and operated HVAC company that has been proudly serving Rock county for over 15 years. We are a residential heating and air conditioning contractor that provides exceptional quality and workmanship with every project we take on. Currently, we do not work on mobile homes and apologize for the inconvenience. Call today to schedule your appointment; we look forward to meeting you!

"Great company , great prices, great service."

Evelyn M on October 2017

"Great company , great prices, great service."

Evelyn M on October 2017

Lifetime Home Services

Lifetime Home Services

Customers say: Quality work

Recommended by 96% of Angi customers

Owner Operated. Cost determined by the job. NRPP Certification #RMT-101552, AARST Member. Licensed. Cash accepted. https://www.lifetimehomeservices.com/

"They did an outstanding job. First rate. I would highly recommend Lifetime Home Services."

Dan K on January 2025

Owner Operated. Cost determined by the job. NRPP Certification #RMT-101552, AARST Member. Licensed. Cash accepted. https://www.lifetimehomeservices.com/

"They did an outstanding job. First rate. I would highly recommend Lifetime Home Services."

Dan K on January 2025

Heating Oil questions, answered by experts

It’s a better use of energy (and your money) NOT to run an ERV system all the time. Most experts recommend that you cycle your ERV system on and off throughout the year. However, the recommended advice could change based on your climate, the number of people in your home, the size and style of your home, and your heating and cooling system. Contact a local pro for more specific advice.

Yes, including optimizing settings and suggesting upgrades if needed.

Yes, many providers offer organic or eco-friendly treatments. Confirm availability with your contractor.

A geothermal heat pump system will take about 10 years to pay for itself, and it has a life span of anywhere from about 25 to 50 years. Installing a geothermal heat pump will cost about $14,250 upfront, but it can reduce your energy bills by around 65% when compared to a conventional HVAC system.

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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