How often should I change my HVAC air filter?

Replace most filters every 1–3 months. Homes with pets, allergies, or higher dust may need monthly changes.

When should I repair vs. replace my HVAC system?

Consider replacement if the unit is 10–15+ years old, needs frequent repairs, uses R-22, or can’t maintain comfort. If a repair costs over ~40% of replacement, a new system may be wiser.

Can HVAC maintenance lower energy bills?

Yes. Clean filters, sealed ducts, proper refrigerant charge, and annual tune-ups improve efficiency. High-efficiency equipment and smart thermostats can save even more.

Do you offer emergency HVAC repair?

Yes. Contact Atteberry & Marshall for prompt heating and cooling repairs when you need help fast.

Mon - Fri: 7:30AM - 5:00PM

24/7 Emergency Service

Mon - Fri: 7:30AM - 5:00PM

24/7 Emergency Service

Answers to Common Heating & Cooling Questions

Q: Why isn’t my air conditioner cooling?

Check thermostat mode (COOL), setpoint, a clean air filter, open vents, and breakers. If it still won’t cool, schedule service with Atteberry & Marshall in Mattoon and East Central IL.

Q: Why is my furnace blowing cold air?

Common causes include a clogged filter, thermostat settings, closed gas valve, or an ignition issue. If basic checks don’t help, we can diagnose and repair it.

Q: Do you offer HVAC financing?

Yes. We partner with Synchrony to provide flexible HVAC financing options for new systems and major repairs, subject to credit approval.

Q: How often should my HVAC system be serviced?

At least annually—ideally twice a year: a spring AC tune-up and a fall furnace or heat pump tune-up for best performance and reliability.

Q: What areas do you serve?

We serve Mattoon, Charleston, Effingham, and surrounding communities throughout East Central Illinois.

Q: How do I schedule HVAC service?

Call us or request an appointment on our website. We’ll confirm your details, recommend next steps, and get you on the schedule.

Whether you’re scheduling service, planning a new installation, or looking into financing, Atteberry & Marshall is here to help. Browse our FAQs below for quick answers about heating, cooling, and more.

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Troubleshooting & Service

Why isn't my air conditioner cooling?

This can happen if the thermostat is set incorrectly, the air filter is dirty, vents are blocked, a breaker has tripped or a dirty outdoor coil. If none of these quick checks solve it, it’s time to call Atteberry & Marshall for professional service.

Why is my furnace blowing cold air?

A clogged filter, thermostat issue, closed gas valve, or ignition problem are all common culprits. If your furnace still won’t heat, our technicians can diagnose and repair it quickly.

Why won't my heat pump turn on?

Check the thermostat settings, power switches, and circuit breakers. If the system still won’t start, you may need a service visit to identify the issue.

How do I know if my HVAC system needs repair?

Warning signs include unusual noises, uneven heating or cooling, frequent cycling, or higher energy bills. If you notice any of these, give us a call.

Do you offer emergency HVAC service?

Yes. Heating and cooling problems often happen outside of business hours. We provide fast, reliable emergency service when you need it most.

Maintenance

How often should I change my air filter?

Yes. Heating and cooling problems often happen outside of business hours. We provide fast, reliable emergency service when you need it most.

How often should my HVAC system be serviced?

At least once a year — ideally twice. A spring tune-up prepares your cooling system, and a fall tune-up gets your furnace or heat pump ready for winter.

What happens during a maintenance visit?

Our technicians check all major components, clean and adjust parts, test safety systems, and make sure your unit is running efficiently.

Can maintenance help lower my energy bills?

Yes. Clean filters, well-tuned equipment, and sealed ductwork all help your system use less energy while keeping your home comfortable.

Replacement & Upgrades

When should I replace my HVAC system instead of repairing it?

If your system is 10–15 years old, needs frequent repairs, or struggles to keep your home comfortable, replacement is often the best option.

How long does a furnace or air conditioner last?

On average, furnaces last about 15–20 years and air conditioners last 12–15 years with regular maintenance.

What are the benefits of upgrading to a high-efficiency system?

High-efficiency systems reduce energy costs, improve comfort, and may qualify for rebates or incentives.

Financing & Payment

Do you offer HVAC financing?

Yes. Atteberry & Marshall partners with Synchrony to provide flexible financing options for new systems and major repairs.

Click Here to learn more about financing options.

Can I finance repairs as well as a new system?

In many cases, yes. We can review financing options to help make unexpected repairs more manageable.

How does Synchrony financing work?

Synchrony offers credit-based financing with flexible payment terms. Our team can help you apply and find the right plan for your needs.

Click Here to learn more about financing options.

What credit score do I need to qualify for financing?

Approval depends on Synchrony’s credit review, but many customers are able to qualify for HVAC financing.

Click Here to learn more about financing options.

Company & Service Area

What areas do you serve?

We proudly serve homeowners throughout East Central Illinois.

How quickly can you respond to service calls?

Response times vary depending on demand and weather, but we always prioritize emergencies and work to schedule you as quickly as possible. To ensure same day service ask about our Special Comfort Care Contract.

Click here to learn more about our Special Comfort Contract.