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Verified Reviews for Heating And Air Conditioning Service pros in Dieterich, IL

*The Angi rating for Heating And Air Conditioning Service companies in Dieterich, IL 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 Dieterich, IL 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 September 24, 2026

Top-Rated Heating and air conditioning pros in Dieterich - Updated Nov 2026

Avatar for SHAWNEE HEATING & AC LLC
SHAWNEE HEATING & AC LLC
5.0(
8
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallDucts & Vents - Install or Replace+6 more

Serving Dieterich, IL and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"Jeremiah was absolutely wonderful! Got the job done extremely fast. Would definitely recommend to anyone that needs heating and cooling services"
Mini Split
13 neighbors recently requested a quote
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Next Phase Power LLC
New to Angi
Electrical Baseboard or Wall Heater - InstallElectrical Baseboard or Wall Heater - RepairThermostat - Install or Replace

Serving Dieterich, IL and surrounding areas

Approved

My name is David Michl, and Next Phase Power LLC is built on 20 years of hands-on electrical experience across residential, commercial, and industrial work. From home wiring to underground PVC trenching for services, fuel stations, and farms, I understand how important reliable power is to everyday life.\nProudly serving Jasper County, Effingham, and surrounding communities with dependable service, honest work, and quality craftsmanship. Fully licensed and insured, competitive pricing, and free estimates. Feel free to call or text anytime, and don’t forget to leave a review here or on our Facebook page. Thank you for your support!

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Daniel Wallace
New to Angi
Thermostat - Install or Replace

Serving Dieterich, IL and surrounding areas

Approved

I’m a hardworking person who doesn’t like to leave projects half finished or looking sloppy, I can be a bit of a perfectionist. I’ve always fixed and built almost everything I needed myself and I take pride in being self sufficient. I’ve been an electrician for a year and half now and before that I was fabricating aerators for private residences. I have a wife and two children, so I can handle the chaos of a whole house remodel even if you decide to alter any details halfway through.

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Wabash Electric Heating & Cooling LLC
5.0(
7
)
Air Ducts & Vents - CleanCentral A/C - InstallCentral A/C - Service or Repair+28 more

Serving Dieterich, IL and surrounding areas

In business since 1970

Free estimates

Emergency services offered

"Got my ductwork cleaned out and replace 23 outlet covers. All done in record time. Very friendly and professional and explained the whole process as he went and showed me all the junk that came out of my ducts. Cleaned up as he went along and couldn't even tell he had been here except that there's no dust floating around in the air now."
Response time8 hrs
Recommended by100%of homeowners
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Avatar for Rardin Plumbing Heating & A/C
Rardin Plumbing Heating & A/C
4.6(
11
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+47 more

Serving Dieterich, IL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"They are excellent. I am a truck driver and not home very much. I needed my pipes winterized so they wouldn't freeze. The antifreeze is non-toxic. They drained my hot water heaters, put the antifreeze in. He turned off the water and made sure that it was winterized. I could turn the heat off. I thought it was high until, I realized they used two cases of antifreeze, and it is expensive. They were professional, courteous, and no issues. The price was good. I have no complaints with anything they did. I had to make an appointment, because they are busy. It took a while for them to come out on time and they showed up on time. Everything was good. They provided a good quality service at a reasonable price."
Recommended by100%of homeowners
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Showing 1-10 of 45
Heating and Air Conditioning FAQs, answered by experts

It’s never a good idea to run your AC without a filter, even just for a night. The filter defends your HVAC system from the dust, dirt, debris, and other grime in your home. Without a filter, those contaminants are more likely to get inside your system and potentially damage it. 

Signs that your air conditioner capacitor is bad or failing include a range of symptoms. The AC unit may not turn on at all, or it might struggle to start before shutting down randomly or in the middle of a cooling cycle. You might hear a humming or banging noise when it attempts to start, or the compressor might hum without the unit actually running. Other indicators include a smell or smoke coming from the unit, the blower circulating room-temperature air instead of cold air, and an unexpected increase in your energy bills.

Ideally, an AC system should never need more Freon (a popular refrigerant) because it circulates in a closed loop. However, refrigerant leaks are not uncommon and may occur gradually over 5 to 15 years. If your system has a leak, it will need to be topped up in a process known as an AC recharge. Signs of a refrigerant leak include weakened AC performance, increased humidity in your home, higher utility bills, and a hissing sound from the unit. The cost of an AC recharge will depend on the size and type of your AC unit, as well as the type of refrigerant it uses.

Replacing both an AC and a furnace takes a full day on average, ranging from eight to 12 hours. The process involves removing the old units, installing the new ones, and ensuring all connections are properly made. If both systems are being replaced simultaneously, it can take longer than installing a furnace alone, so plan accordingly.

AC evaporator coils should be cleaned at least once per year to keep your unit in good condition. For optimal performance, consider cleaning them twice a year—once before and once after the main cooling season. More frequent cleanings may be necessary for older systems, units with performance issues, or those in climates with high levels of humidity, dust, and dirt.

The Dieterich, IL 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.

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