Sudden High Energy Bills in Nine Mile Falls, WA

Here's the reality: a furnace that's quietly losing efficiency isn't just costing you money. It's telling you something is wrong mechanically.

Left alone, the root cause tends to get worse - not better. A dirty heat exchanger runs hotter than it should. A failing blower motor draws more current until it burns out completely. A cracked heat exchanger (the metal barrier between combustion gases and your living air) can allow carbon monoxide to migrate into your home.

That last one is the one that matters most.

If you or anyone in your home is experiencing headaches, nausea, or dizziness - especially when the furnace is running - get to fresh air immediately. Seek medical help if symptoms are present, then call us. CO has no smell and no color. You won't know it's there until someone feels it.

A rising energy bill on its own is a financial problem. A rising energy bill paired with any of those symptoms is a safety problem. Treat it accordingly.

Nine Mile Falls has seen a lot of residential growth over the past 15–20 years. Many of those homes were built with builder-grade furnaces - units that were adequate at installation but are now hitting the end of their designed lifespan. When a furnace ages out of peak efficiency, the decline isn't always dramatic. It's often slow and quiet, showing up first on your utility bill.

Here are the most common mechanical reasons a furnace starts burning more fuel or electricity than it should:

1. Dirty or Clogged Heat Exchanger The heat exchanger is the metal component that transfers combustion heat into your airflow without mixing exhaust gases into your living space. When it gets coated with residue - or develops a crack - heat transfer drops. The burner runs longer to hit your set temperature. Longer run time = higher bill.

2. Failing or Undersized Blower Motor The blower motor pushes conditioned air through your ductwork. When it starts to fail, it either draws excessive electrical current (spiking your electric usage) or moves less air per cycle (forcing longer run times). Either way, your bill goes up.

3. Restricted Airflow - Ducts, Filter, or Registers A severely clogged filter, a collapsed duct section, or closed/blocked registers forces the furnace to work against resistance. It's like trying to breathe through a straw. The system compensates by running longer cycles.

4. Ignition or Burner Inefficiency If the burners aren't firing cleanly - due to carbon buildup, a weak igniter, or a partially failing gas valve - combustion efficiency drops. You're burning more gas to produce less usable heat.

5. Thermostat Calibration Drift A thermostat that reads the room temperature incorrectly will call for heat more often than needed. This one is easy to overlook because the house still feels comfortable - the bill is the only clue.

6. Duct Leakage Conditioned air leaking out of duct joints into unconditioned spaces (crawlspaces, attics, wall cavities) is wasted heat. The furnace keeps running because the living space never quite reaches setpoint. This is especially common in homes where original ductwork was never sealed or tested.

7. Aging System Efficiency Decline A furnace rated at 80% efficiency when new may be operating at 65–70% after 15+ years of use without maintenance. That gap shows up directly on your gas bill.

Before you call, there are a few things you can check safely on your own. These won't replace a professional diagnosis, but they can rule out simple causes.

• Check your air filter. Pull it out and hold it up to light. If you can't see light through it, it's overdue for replacement. A clogged filter is one of the most common causes of efficiency loss.
• Walk your registers. Make sure supply and return vents throughout the house are open and unblocked by furniture, rugs, or curtains.
• Check your thermostat settings. Confirm it's set to "heat" and "auto" (not "on," which runs the fan continuously regardless of heat demand).
• Look at your utility bill history. Compare this month to the same month last year. A 20–30% spike with no change in usage habits points to a mechanical issue, not just rate changes.
• Listen to your furnace. Unusual sounds - grinding, short cycling (turning on and off rapidly), or long continuous runs - are clues worth noting before we arrive.