When a bill climbs without the weather explaining it, the cause is usually one of a small number of things — and they are not the ones people typically suspect.
Key takeaways
- Leaking or disconnected ductwork sends air you paid for into crawlspaces and attics.
- A heat pump leaning on backup heat keeps the house warm while the bill doubles or triples.
- Skipped maintenance costs efficiency a slice at a time, and the slices compound.
- A new thermostat helps a little. It will not fix ducts, charge or sizing.
From the shop on East Main Street in Church Hill
Where the money is going, roughly in order
- #1
Ductwork problems
Ductwork problems are often the least visible culprit. Crushed, disconnected or leaking duct in a crawlspace or attic sends conditioned air into space no one lives in. Worse, leaks on the return side pull crawlspace air into the system, so you pay to condition it too.
- #2
Auxiliary heat running when it should not
Auxiliary heat running when it should not is the one behind the most surprising winter bills. If a heat pump is underperforming, the electric backup strips carry the load silently. The house stays warm, no alarm goes off, and the bill can double or triple.
The signature
- The house stays warm
- No alarm goes off
- The bill doubles or triples
- #3
Skipped maintenance
Skipped maintenance shows up gradually. A fouled coil, a low charge or a restricted filter each cost a slice of efficiency, and they compound.
- #4
Oversized equipment
Oversized equipment short-cycles, and starting a compressor is the most energy-intensive thing it does. A unit that starts constantly and runs briefly is expensive to run and less comfortable as well.
- #5
The building itself
Behind all of that sits the building itself — insulation, air sealing and windows — which is not our trade but is worth knowing about before you replace equipment that was never the problem.
ChecklistWorth checking, roughly in order of impact
- Disconnected or leaking ductwork in crawlspaces and attics
- Auxiliary electric heat carrying the load unnoticed
- Dirty coils and a low refrigerant charge
- Restricted airflow from filters and crushed ducts
- Oversized equipment short-cycling
- A thermostat or dual-fuel changeover configured wrongly
- Failing capacitors making motors draw more current
- Insulation and air sealing in the building itself
Common follow-ups
My electricity bill tripled this winter. What happened?
The most likely cause is auxiliary electric heat carrying the load because the heat pump is not performing. The classic signs are a house that stays warm, no alarm, and a bill that climbs. It is worth calling us promptly.
Will a new thermostat lower my bills?
A little, through better scheduling. It will not fix leaking ducts, a low charge or a system that is the wrong size — and those are usually where the money is going.
Would you like help with your own system?
Free estimates on new equipment. We measure before we quote.
(423) 357-1922