September 24, 2025 • Furnace Maintenance
As the leaves start to change color and a crisp chill fills the air, every homeowner in Metro Detroit knows what’s coming next: a long, cold Michigan winter. Before you need to rely on your furnace 24/7, it’s crucial to make sure it’s in top working condition. Ignoring small warning signs now can lead to a complete breakdown when you need heat the most.
Here are five common signs that your furnace is calling out for a professional repair service.
1. Strange Noises
Your furnace should operate relatively quietly. If you start hearing new or unusual sounds, it's a clear sign that something is wrong. Listen for:
- Banging or Popping: This could indicate an issue with your burners or ductwork.
- Squealing or Whining: Often points to a problem with the blower motor or a belt.
- Grinding or Scraping: This is a serious sound that could mean worn-out motor bearings. Turn off your furnace immediately and call a professional to prevent further damage.
2. Unusually High Energy Bills
Have your heating bills suddenly spiked without a change in your usage? A furnace that is struggling to operate efficiently will run longer and work harder to heat your home, driving up your energy consumption. A professional tune-up or repair can often restore its efficiency and bring your bills back down to normal.
3. The Pilot Light is Yellow
If you have an older furnace with a pilot light, take a quick look at the flame. A healthy pilot light should be a steady, blue color. If the flame is yellow, flickering, or weak, it could be a sign of a ventilation problem or an issue with the gas mixture. This is not just an efficiency problem—it can be a potential carbon monoxide hazard and needs to be inspected right away.
4. Your Home Isn't Heating Evenly
Are some rooms in your house warm and cozy while others feel like an icebox? If your furnace is running but failing to distribute heat evenly, the problem could be with the furnace itself or with your ductwork. A weak blower motor or leaky ducts can prevent warm air from reaching every part of your home.
5. The System Turns On and Off Frequently
This is known as "short cycling." Your furnace should run for a consistent period to bring your home to the desired temperature and then shut off. If it's turning on and off every few minutes, it could be caused by a clogged filter, an oversized system, or a faulty thermostat. This constant starting and stopping puts major stress on the components and can lead to a premature breakdown.
Don't Wait for a Breakdown
If you've noticed any of these signs, don't wait for a small problem to become a major, expensive repair in the middle of winter. The best time to address furnace issues is in the fall, before the heavy heating season begins.
The certified technicians at Mechanical Temp are here to help. We provide expert furnace repair and maintenance services throughout Southfield and the entire Metro Detroit area. Schedule a furnace inspection today and ensure your home stays warm and comfortable all season long.