FAQ

Where can I buy furnace filters for my furnace?

Do you sell furnace and AC parts to the public?

How often should I change my furnace filter?

When should I change my humidifier pad?

What’s the best way to get my air conditioner up and running in the spring?

What can I do to improve my indoor air quality?

What areas do you service?

My furnace isn’t working right – what can I do before I call?

What should I look for in a good heating and cooling contractor?

What is an energy efficient furnace or a high efficiency furnace?

Another company installed our furnace, and now they won’t service it. Can you help?

How do I clean an electronic air cleaner?

What heating and cooling services do you offer?

I have a “no heat” situation – my furnace stopped and it’s 3am. Do you offer emergency service?


 

Where can I buy furnace filters for my furnace?

We carry popular brands of furnace filters for all brands of furnaces in stock and can ship them directly to your home or office.

Do you sell furnace and AC parts to the public?

Yes, we carry ALL major brands of furnace and air conditioner parts, specializing in Lennox parts.

How often should I change my furnace filter?

Media Filters 4-5" - A minimum of two times a year. If the filter is 1 inch or thinner, it should be replaced once a month. When you need to change the filter also depends on the type of filter for your furnace. We sell a few different types of filters. Typically, we provide filters by determining the filter thickness and Minimum Efficiency Reporting Value, or MERV rating, which is from 1 to 16. The MERV rating is based on an air filter’s efficiency, so the higher the MERV rating, the more efficient the air filter is at removing particles. MERV 8 would be yesterday’s standard, while MERV 10 is today’s standard. However, MERV 16 is the best you can get, and is one of our more popular filters.

Your heating and cooling system is like your car; it needs regular maintenance from qualified technicians

When should I change my humidifier pad?

Once a year, after the heating season—meaning that it should be done in the early spring, just before you turn your air conditioner on. This will prevent mold and dirt from building up in the pan and on the pad.

What’s the best way to get my air conditioner up and running in the spring?

  1. Remove the air filter on the furnace and clean it out.
  2. If you have a humidistat, turn it from 35% to 0%.
  3. 24 hours before starting your air conditioning, turn the disconnect back on.
  4. Wash the condenser unit (that's the unit outside your house). Set your hose nozzle for a fine spray of water and spray from the top down.
  5. Turn on your air conditioning and enjoy the cool comfort inside.

Remember though, your heating and cooling system is like your car; it needs regular maintenance from qualified technicians.

What can I do to improve my indoor air quality?

  1. Keep windows and doors closed during prime ragweed season.
  2. Ventilate your home & use exhaust fans when you cook or shower.
  3. Filter the air with an air cleaner and make sure you clean the filter regularly.
  4. Treat the air with an ultraviolet air treatment system.
  5. Maintain the right relative humidity between 45%-65% as recommended by the EPA.

Call Mr. Furnace! We can help keep your home safe and comfortable.

What areas do you service?

Mr Furnace on the Residential HVAC side, and A.S. Contrera on the Commercial HVAC side, serve Macomb County, Oakland County and Wayne County as our primary HVAC service areas, but we also serve all of Southeast Michigan.

My furnace isn’t working right – what can I do before I call?

  1. Make sure you have power to your furnace: in the lower portion of the furnace you’ll see a small sight glass, it will be round and about 2 inches in diameter. Check and see if you can see two lights flashing. If you can see these lights, then you know you at least have power to the furnace.
  2. Next, listen to the furnace while it’s running. Do you hear any unusual noises? Is the fan running? You should be able to hear the whirring noise that a fan would make. If not, then your fan is not working properly.
  3. Next, lift the access panel off the furnace, there should be a listing of fault codes. If you can determine what the possible problem is based on those codes, you can help us establish the proper course of action. This step can save you the time and money of our technicians having to come to your home and fix a problem that you might be able to fix yourself.

If this doesn't help call us at Mr. Furnace - our technicians are available 24x7.

What should I look for in a good heating and cooling contractor?

  1. Make sure that they are licensed and insured.
  2. Make sure that they use name brands.
  3. Verify that their technicians are qualified.
  4. Your contractor should make you feel comfortable.
  5. Your contractor should have excellent references.

What is an energy efficient furnace or a high-efficiency furnace?

Furnaces are rated with efficiency levels utilizing the Annual Fuel Utilization Efficiency standard (AFUE). The minimum AFUE number that is required is at least 80, so the higher AFUE number, the better! So, if you have an 85% efficient furnace, it means that for every dollar that is spent to fuel your furnace, 85 cents is used to heat the home while the other 15 cents is lost. It may not sound like much to lose, but it definitely adds up over time.

Another company installed our furnace, and now they won’t service it. Can you help?

Of course, call us! We offer 24-hour service!

How do I clean an electronic air cleaner?

You can put it directly in your dishwasher or spray it with 409 cleaner. If you use 409 cleaner, let it dry and re-install it. If you put it in your dishwasher, use a soap that leaves no film and be sure to protect the thin wires in the cleaner from the spikes in the dishwasher tray. One way to protect them is to set the cleaner on top of glasses that are placed over these spikes in the dishwasher.

What heating and cooling services do you offer?

We provide new furnace and air conditioner installations. We also handle all residential furnace and air conditioner repair & maintenance in Michigan.

We also offer:

  • Exhaust Systems
  • Custom Design/Build
  • Heating Repairs
  • Boiler Repairs
  • Furnace Repairs
  • Air Conditioning
  • Sales Service & Repairs
  • Commercial Heating and Cooling
  • Residential Heating and Cooling
  • Sheet Metal Work
  • Preventative Furnace and AC Maintenance
  • Make Up Air Systems
  • Humidifiers/Air Cleaners
  • Thermostat Installation
  • Hot Water Tanks
  • Commercial Furnace Repairs
  • Commercial Rooftop Unit Repair
  • Commercial Boiler Repairs
  • Commercial Air Conditioning

I have a “no heat” situation – my furnace stopped and it’s 3am. Do you offer emergency service?

We are available for Emergency Service 24/7 at (586)-754-6700.


Our products are quoted accurately and the work is always completed on time without cost overruns or hidden extras. Contact us today for a free quote on a new heating or cooling system, or for maintenance & repair of your existing one.


  • American Standard
  • Trane
  • Carrier
  • Bryant
  • Lennox
  • Honeywell
  • Space Pak