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    Verified heating oil services reviews

Find Heating oil pros in Maryland Heights

Avatar for Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning

Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning

6068 BAUMGARTNER INDUSTRIAL DR
4.71(
256
)
Approved Pro

Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Conditioning

6068 BAUMGARTNER INDUSTRIAL DR
4.71(
256
)
Approved Pro
Customers say: Super punctual
440 local quotes requested
22 years of experience

Now offering one hour service for heating and air conditioning service. We are factory authorized to service all major brands and we offer all the top products in the industry. Year to year we win numerous awards for customer service and technical skill. Our team is dedicated to providing you with the attention to detail and customer service that can create a whole new level of comfort and energy savings. Led by owner Brett Nejmanowski, our company provides expert sales, service and installation. We have a team of technicians that are fully qualified to help you select the comfort system that best fits your home and your budget. We serve the greater St Louis area, and are a no-nonsense, everything-on-the -table kind of heating and cooling company. Our written 100% satisfaction guarantee is behind all the work we do – if you’re not happy with our heating and cooling services for any reason, we’ll make it right or give your money back, no questions asked! No matter if it is a furnace or AC repair, furnace and AC installation, heat pump installation, or anything heating and air conditioning-related, you will have our guarantee. Along with the services we provide, we’re also passionate about our duty to protect the environment and our social responsibility to the community. In our daily practices, we utilize earth-friendly products and methods to ensure clean outdoor and safe indoor environments for the people we serve. We regularly give back to the community through volunteer work and financial donations. Among the charitable organizations we support are Safe Kids USA, National Multiple Sclerosis Society, Autism Speaks and the Sheriffs’ Association. Financing options available. Numerous rebate programs available. Government subsidized programs available to qualifying homes. Additional phone number (618) 717-0707 Also servicing clients from both 14248 F Manchester Rd, Ste. 190, Manchester MO, 63011 & 110 West Main St., Ste. A, Belleville IL, 62220!

"Very professional and thorough"

Carla F on May 2025

Now offering one hour service for heating and air conditioning service. We are factory authorized to service all major brands and we offer all the top products in the industry. Year to year we win numerous awards for customer service and technical skill. Our team is dedicated to providing you with the attention to detail and customer service that can create a whole new level of comfort and energy savings. Led by owner Brett Nejmanowski, our company provides expert sales, service and installation. We have a team of technicians that are fully qualified to help you select the comfort system that best fits your home and your budget. We serve the greater St Louis area, and are a no-nonsense, everything-on-the -table kind of heating and cooling company. Our written 100% satisfaction guarantee is behind all the work we do – if you’re not happy with our heating and cooling services for any reason, we’ll make it right or give your money back, no questions asked! No matter if it is a furnace or AC repair, furnace and AC installation, heat pump installation, or anything heating and air conditioning-related, you will have our guarantee. Along with the services we provide, we’re also passionate about our duty to protect the environment and our social responsibility to the community. In our daily practices, we utilize earth-friendly products and methods to ensure clean outdoor and safe indoor environments for the people we serve. We regularly give back to the community through volunteer work and financial donations. Among the charitable organizations we support are Safe Kids USA, National Multiple Sclerosis Society, Autism Speaks and the Sheriffs’ Association. Financing options available. Numerous rebate programs available. Government subsidized programs available to qualifying homes. Additional phone number (618) 717-0707 Also servicing clients from both 14248 F Manchester Rd, Ste. 190, Manchester MO, 63011 & 110 West Main St., Ste. A, Belleville IL, 62220!

"Very professional and thorough"

Carla F on May 2025


"He came right away fixed the problem and was very reasonable with the price "

Robin M on October 2025

Good Service Heating and Cooling,LLC. Over 30 years of HVAC experience. Honest and affordable. Do it right the first time.

"He came right away fixed the problem and was very reasonable with the price "

Robin M on October 2025


American Airtemp LLC

1238 Traverton Dr
New on AngiNew on Angi
Approved Pro

American Airtemp LLC

1238 Traverton Dr
New on AngiNew on Angi
Approved Pro
17 years of experience

American Airtemp LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

American Airtemp LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.


Avatar for Hoffmann Brothers

Hoffmann Brothers

1025 Hanley Industrial Ct.
4.72(
38
)
Approved Pro

Hoffmann Brothers

1025 Hanley Industrial Ct.
4.72(
38
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
25 years of experience

The Heating and Air Conditioning Contractors at Hoffmann Brothers have provided the greater St. Louis area with reliable and professional services for more than 40 years. When you are in need of heating, ventilation, and air conditioning (HVAC) contractors for any of your heating or air conditioning repair or replacement service needs, call upon us at (314) 664-3011 or contact our team online.

"Good"

Andrew W on August 2024

The Heating and Air Conditioning Contractors at Hoffmann Brothers have provided the greater St. Louis area with reliable and professional services for more than 40 years. When you are in need of heating, ventilation, and air conditioning (HVAC) contractors for any of your heating or air conditioning repair or replacement service needs, call upon us at (314) 664-3011 or contact our team online.

"Good"

Andrew W on August 2024


Avatar for Siefert Mechanical - Heating & Cooling

Siefert Mechanical - Heating & Cooling

15 Linda Ln
5.00(
43
)

Siefert Mechanical - Heating & Cooling

15 Linda Ln
5.00(
43
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Specializing in new system installs, System replacement, indoor air quality products such as humidifiers, EAC electronic air cleaners, ductless systems (mini splits) & Wi-fi thermostats. Providing both light commercial & residential service in St. Louis! Our #1 priority is your satisfaction!

"I previously worked with another company to replace my furnace. The first company was extremely flakey and would constantly cancel my appointments or simply not show up. Eventually, I decided to go on Angie's List, and I found Siefert Mechanical. This company was extremely quick to get to my house, give me an estimate, and then perform the service. Not only did Siefert Mechanical quote me a price that was $600 less than the first company, they also never cancelled or missed an appointment. They came out once to give me a quote, then the very next time they came out to my house, they replaced my furnace. The quality of their work is extremely professional, and I would HIGHLY recommend this company for any heating/cooling service you need performed."

Aaron C on January 2021

Specializing in new system installs, System replacement, indoor air quality products such as humidifiers, EAC electronic air cleaners, ductless systems (mini splits) & Wi-fi thermostats. Providing both light commercial & residential service in St. Louis! Our #1 priority is your satisfaction!

"I previously worked with another company to replace my furnace. The first company was extremely flakey and would constantly cancel my appointments or simply not show up. Eventually, I decided to go on Angie's List, and I found Siefert Mechanical. This company was extremely quick to get to my house, give me an estimate, and then perform the service. Not only did Siefert Mechanical quote me a price that was $600 less than the first company, they also never cancelled or missed an appointment. They came out once to give me a quote, then the very next time they came out to my house, they replaced my furnace. The quality of their work is extremely professional, and I would HIGHLY recommend this company for any heating/cooling service you need performed."

Aaron C on January 2021


Avatar for Davis Heating and Cooling

Davis Heating and Cooling

103 Karl Pl
No reviews yet

Davis Heating and Cooling

103 Karl Pl
No reviews yet
17 years of experience

*We been in business since February 2008, five employees....over hundreds of customers on both side of the river, Missouri and Illinois. *We also do sub-contracting work. *We accept cash, checks and credit card *Special offers and promotion for new or existing customers *we provide financing options for customers

*We been in business since February 2008, five employees....over hundreds of customers on both side of the river, Missouri and Illinois. *We also do sub-contracting work. *We accept cash, checks and credit card *Special offers and promotion for new or existing customers *we provide financing options for customers


AUTUMN AIR COMPANY

222 Birmingham Dr
5.00(
5
)

AUTUMN AIR COMPANY

222 Birmingham Dr
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Family owned business since December of 1977. We dedicate ourselves to fixing what you have if possible keeping the most common replacement parts on the truck and when we do suggest a change out of a furnace or air contitioner we concentrate on really highly efficient equipment so that when you change the old out your utility bills take a substantial dive. We are an Ameren approved contractor for all of their rebates. We are licensed up to Industrial in St. Charles County and have all licenses needed. After hours, 8 PM till 7 AM appointments require a $25 up-charge.

"Went awesome I have used this company for years. Always works with me and explains everything so I can understand it. He put a heat pump in for me couple years ago. He also kept my older unit running for me to help me out as long as he could. Very considerate."

Mary G on March 2019

Family owned business since December of 1977. We dedicate ourselves to fixing what you have if possible keeping the most common replacement parts on the truck and when we do suggest a change out of a furnace or air contitioner we concentrate on really highly efficient equipment so that when you change the old out your utility bills take a substantial dive. We are an Ameren approved contractor for all of their rebates. We are licensed up to Industrial in St. Charles County and have all licenses needed. After hours, 8 PM till 7 AM appointments require a $25 up-charge.

"Went awesome I have used this company for years. Always works with me and explains everything so I can understand it. He put a heat pump in for me couple years ago. He also kept my older unit running for me to help me out as long as he could. Very considerate."

Mary G on March 2019


Scott Lee Heating Company

11010 Gravois Industrial Ct.
4.90(
115
)

Scott Lee Heating Company

11010 Gravois Industrial Ct.
4.90(
115
)
Customers say: True professional
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers

Award winning. Additional phone number's - (636) 394-3351, (636) 949-8662, (636) 942-9949, (314) 756-9440, (636) 343-1444 & (314) 330-3545. Lennox Premier dealer.

"They were on time, they were honest and they did a good work."

Dean G on June 2022

Award winning. Additional phone number's - (636) 394-3351, (636) 949-8662, (636) 942-9949, (314) 756-9440, (636) 343-1444 & (314) 330-3545. Lennox Premier dealer.

"They were on time, they were honest and they did a good work."

Dean G on June 2022

Heating Oil questions, answered by experts

Leaks, poor airflow, reduced efficiency, and loop blockages are common problems requiring service.

Yes, technicians check refrigerant levels, loop performance, and system calibration for peak efficiency.

Yes, including optimizing settings and suggesting upgrades if needed.

While it's generally safe to stay in a home with a coolant leak if your home is properly ventilated, it's important to have a professional come out to assess the situation right away. You should evacuate your home if you notice any powerful fumes. Additionally, you should leave your home if you are experiencing headaches or dizziness.

HVAC systems usually last between 10 and 30 years, with most having a lifespan of around 20 years. Factors that impact a unit’s life expectancy include which brand you choose, how often you use it, and how well you maintain it. To make sure yours lasts as long as possible, make sure to keep it clean and schedule an annual service with an HVAC technician.

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