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Q: Why is my furnace and AC turning on at the same time?

• <div><p>There are two main reasons your furnace and AC are turning on at the same time. The first could be that you&rsquo;re confusing the furnace with the blower. The blower is located in the furnace and will turn on to distribute cool air from the air conditioner through the ductwork in the home. This is normal. If the actual furnace is turning on at the same time as the AC and hot and cool air are coming into the home, it could be a result of incorrect writing to a new thermostat or new systems.</p></div>

Q: Do window AC units have problems with overcharged refrigerants?

• <div><p>They can, but it&rsquo;s not as common. <a href="https://www.angi.com/articles/troubleshooting-window-ac-problems.htm">Window AC units</a> are much smaller than whole-house systems and less likely to develop refrigerant leaks or similar issues. As a result, you will rarely need to add a new refrigerant, limiting overcharging problems. However, it&rsquo;s still important to leave refrigerant management in the hands of professionals when window units need work.</p></div>

Q: Are all HVAC Schrader valves the same?

• <div><p>As mentioned above, not all HVAC Schrader valves are necessarily the same. While the valve core and pin or spring size on Schrader valves used for HVAC are generally similar, the valves are not all universal and interchangeable. The size of Schrader valves varies depending on whether it's used in an air conditioner, bicycle tire, or motor vehicle tire.</p></div>

Q: What happens when a return vent is blocked?

• <div><p>A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home&rsquo;s air. </p></div>

Q: How much does it cost to replace an AC unit?

• <div><p><a href="https://www.angi.com/articles/how-much-does-installing-new-ac-cost.htm">Installing a new AC unit costs</a> $5,850 on average, but costs vary by the make and model, unit size, and unit type. Portable and window AC units cost between $90 and $550, which is significantly less than central or ductless AC systems. You&rsquo;ll also have to pay for labor. </p></div>

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Verified Reviews for Heating And Air Conditioning Service pros in Ruffin, SC

*The Angi rating for Heating And Air Conditioning Service companies in Ruffin, SC 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 Ruffin, SC 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 November 30, 2025

Reviewed in July 2025
As an elderly couple, going without air conditioning for two days in this heat was incredibly difficult—and honestly, a little scary. We reached out to Sweatman’s HVAC Plumbing & Electrical, LLC, and he didn’t waste a second. He came out right away, without hesitation, and got us taken care of...
Sweatman's HVAC Plumbing & Electrical, LLC
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Reviewed in June 2025
Add HVAC leak that messed up my ceiling. I needed it replaced. the area that was damaged was cut out and replaced. He removed the popcorn from the rest of the ceiling and painted to match.
Abraham Williams Drywall
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Reviewed in December 2024
We used the Dukes Electrical Service company multiple times. The gentleman is professional every time. He came today after I made an emergent phone call this morning due to the air condition with no heat. He was very responsible and professional and came to fix the connection problem. It was...
DUKES ELECTRICAL SVC
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Reviewed in July 2022
This company is great! We had our AC go out (South Carolina in July) and we needed a whole new unit. They came out the same day and replaced our whole system. The guys were very nice and professional. I would highly recommend them!
GAINEY'S HEATING & COOLING
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Reviewed in March 2016
After the machine was in my home recording air samples for three days which is required. They sent a professional technician to show me the results of the data. It's really easy to read data and could tell what times of the day my particulates were worse. He explained he needed to open the air...
E F Martin Mechanical Contractors Inc
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Reviewed in December 2015
I have their yearly comfort plan. They come out twice a year to service my AC/Heater. Tech is very knowledgeable and professional. Always calls to inform when the Tech is on the way so that I don't have to take the whole day off waiting on someone to show. I recommend them to all my friends!!
Air Solutions
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Reviewed in May 2015
We've had very good experiences with them. They've worked for us for a lot of things, mostly heating and some air conditioning. Our heating is working great for us now. It works fine.
Lower State Gas Heating & Air
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Reviewed in May 2014
Paul inspected the foreclosure for structural problems, moisture problems, the A/C unit, the electrical system, the plumbing system, the roof, and the appliances and found several issues, most of which were minor, but substantive. Again, with Paul, you really find out EVERYTHING that needs to...
Atlas Home Inspection Service
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Reviewed in April 2014
Went great. In and out in an hour! AC working good for about 2 years now.
KERSHAW HEATING & COOLING
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Find Heating and air conditioning pros in Ruffin

Day Rate Handyman Services LLC

4.88(

)

•Approved Pro

Day Rate Handyman Services LLC

4.88(

)

•Approved Pro

Customers say: Quick response

Recommended by 94% of Angi customers

198 local quotes requested

We at Day Rate Handyman Services LLC specialize in interior handyman and home renovations. We have over 20+ years of experience. We are your one stop shop for all your handyman needs. Give us a call today for your Free estimate and Daily Rate!

"Great communication; prompt and professional; very knowledgeable; had everything taken care of in timely fashion; great cleanup"

Brenda M on February 2025

"Great communication; prompt and professional; very knowledgeable; had everything taken care of in timely fashion; great cleanup"

Brenda M on February 2025

Dudley Heating & Air

No reviews yet

Dudley Heating & Air

No reviews yet

1 years of experience

No job too big or too small, if you have a problem with your heating and air system call me , a hardworking professional specializing in quality for all your HVAC needs

we are a heating and AC company ready to work on any problems you have regarding your indoor or outdoor AC units. we specialize in repairs, maintenance, and installations of new units. We always make sure our work is as it was done in our our own homes so quality is top priority. We have been in the trade more then 6 years always ready to take on any type heating and air work.

Blake bost

No reviews yet

Blake bost

No reviews yet

We can weld stainless steel carbon steel and we can do copper brazing and soft solder we can do thread pipe and just general welding and fabrication high quality work not just your average worker we can stick tig and MiG inner shield and MiG with gas and where mobile

Livingstone Engineering, LLC

No reviews yet

Livingstone Engineering, LLC

No reviews yet

Free onsite estimate

Mechanical Engineer (PE) - Hvac and any mechanical design work. Energy Efficiency Audits, General Whole-House Handyman, Troubleshooting repair and maintenance expert. Plumbing systems expert. HEATING AND AC expert. Electrical troubleshooting and repair. General home and commercial upfits and remodels consulting and renovations.

Perfect Air Heating & Cooling

5.00(

)

Perfect Air Heating & Cooling

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

WE DO REPAIR,MAINTENANCE,INSTALL, DIAGNOSTIC DUCTWORK with over 16 years of experience handling all your residential and commercial HVAC needs.

"It went Great- they were very knowledgeable and professional/ took the extra time to walk me through it so I could understand-"

Troy H on February 2024

WE DO REPAIR,MAINTENANCE,INSTALL, DIAGNOSTIC DUCTWORK with over 16 years of experience handling all your residential and commercial HVAC needs.

"It went Great- they were very knowledgeable and professional/ took the extra time to walk me through it so I could understand-"

Troy H on February 2024

Hiltons I.E.I.R.

No reviews yet

Hiltons I.E.I.R.

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Simmons Refrigeration Services

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Simmons Refrigeration Services

No reviews yet

We specialize in servicing, maintaining , and installing HVAC equipment. We have over 20 years of experience in the industry of air conditioning and refrigeration. Our company is based on family values and is owner/operated.

Fresh and Clean Heating And Air

4.00(

)

Fresh and Clean Heating And Air

4.00(

)

Customers say: Quality work

Emergency services offered

Specializing in system repair as and changing out units, along with all phases of heating and cooling services and repairs. I am an owner-operated business. Honest and reliable. I have been in the business since 2007. I pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!

"DO NOT RECOMMEND – INSTALLATION ISSUES CAUSED CEILING COLLAPSE Sim Chestnut of Fresh and Clean Heating and Air installed our HVAC unit in 2021 or 2022. Since then, we had recurring issues with the system shutting off due to a full drain pan. In 2023, he stopped responding. Our landlord resumed contact in 2024, and Sim returned to install a pump. The unit stayed on, but water rerouted and pooled in insulation beneath the drain pan. On June 8, 2025, our ceiling collapsed. Sim assessed the damage and blamed the roof. A roofer confirmed the roof (installed within 3 years) was not the issue. Three licensed HVAC techs later identified several install problems: a clogged drain line, unlevel unit, and a rusted, bent pan. The leak stopped once the drain was cleaned and reconnected properly. This review is based on professional evaluations and damage to our home. I will not engage further. Any retaliation, perceived or attempted, will be addressed."

Shalonda B on June 2025

"DO NOT RECOMMEND – INSTALLATION ISSUES CAUSED CEILING COLLAPSE Sim Chestnut of Fresh and Clean Heating and Air installed our HVAC unit in 2021 or 2022. Since then, we had recurring issues with the system shutting off due to a full drain pan. In 2023, he stopped responding. Our landlord resumed contact in 2024, and Sim returned to install a pump. The unit stayed on, but water rerouted and pooled in insulation beneath the drain pan. On June 8, 2025, our ceiling collapsed. Sim assessed the damage and blamed the roof. A roofer confirmed the roof (installed within 3 years) was not the issue. Three licensed HVAC techs later identified several install problems: a clogged drain line, unlevel unit, and a rusted, bent pan. The leak stopped once the drain was cleaned and reconnected properly. This review is based on professional evaluations and damage to our home. I will not engage further. Any retaliation, perceived or attempted, will be addressed."

Shalonda B on June 2025

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Showing 1-10 of 54

Heating and Air Conditioning questions, answered by experts

There are two main reasons your furnace and AC are turning on at the same time. The first could be that you’re confusing the furnace with the blower. The blower is located in the furnace and will turn on to distribute cool air from the air conditioner through the ductwork in the home. This is normal. If the actual furnace is turning on at the same time as the AC and hot and cool air are coming into the home, it could be a result of incorrect writing to a new thermostat or new systems.

They can, but it’s not as common. Window AC units are much smaller than whole-house systems and less likely to develop refrigerant leaks or similar issues. As a result, you will rarely need to add a new refrigerant, limiting overcharging problems. However, it’s still important to leave refrigerant management in the hands of professionals when window units need work.

As mentioned above, not all HVAC Schrader valves are necessarily the same. While the valve core and pin or spring size on Schrader valves used for HVAC are generally similar, the valves are not all universal and interchangeable. The size of Schrader valves varies depending on whether it's used in an air conditioner, bicycle tire, or motor vehicle tire.

A blocked return air vent can cause your HVAC system to work much harder and, therefore, less efficiently. The result is higher utility bills and poorer air quality. A blocked return air vent can also cause unpleasant dust, dander, and odors to linger in your home’s air.

Installing a new AC unit costs $5,850 on average, but costs vary by the make and model, unit size, and unit type. Portable and window AC units cost between $90 and $550, which is significantly less than central or ductless AC systems. You’ll also have to pay for labor.

The Ruffin, SC 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.

See all articles

Angi
•
Nov 21, 2025Nov 21, 2025
How Much Does It Cost to Repair Ductwork in a Crawl Space? [2026 Data]
Repairing ductwork in a crawl space is frustrating and difficult, which is reflected in the cost. Learn why limited access results in a premium cost beyond just a simple increase in labor hours.
Scott Dylan Westerlund
•
Nov 24, 2025Nov 24, 2025
How Much Does Furnace Control Board Replacement Cost? [2026 Data]
If your furnace is malfunctioning, it could be a faulty control board. Find out what a furnace control board replacement costs for parts, labor, and more.
Paige Bennett
•
Nov 4, 2025Nov 4, 2025
How Much Does the Average Furnace Repair Cost? [2025 Data]
What you’ll pay for furnace repairs depends on many factors, including what parts are malfunctioning, where you live, and even the time of day. Here’s a breakdown of what can go wrong with your furnace and the cost to fix those issues.
Dan Simms
•
Nov 4, 2025Nov 4, 2025
5 Signs That Your Furnace Ignitor Is Bad and How to Check It
If you’re having trouble with your furnace firing up or your house just won’t get warm, use this simple DIY guide to check if your furnace ignitor is bad.
Dan Simms
•
Oct 31, 2025Oct 31, 2025
How to Know If You Should Repair or Replace Your Furnace
Not sure if you should repair or replace your furnace? Don’t waste money! Use this guide first to decide on the best strategy for you and your system.
Kelly Weimert
•
Nov 6, 2025Nov 6, 2025
7 Signs You Should Replace Your Heating System
Don't get left out in the cold. These warning signs can help you determine whether you need to replace your heating system to keep you cozy all season long.