Furnace Repair in Delta, UT
Furnaces here run from October through May. If yours quits, tell us what it's doing and a licensed contractor who covers Millard County will get in touch.
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Eight months of heat puts real hours on your furnace
Delta needs furnace heat from October through May, eight months of the year. On winter nights that average 20°F, the burner is cycling on and off for hours at a stretch to hold the house at temperature. Most homes here heat with gas, so the igniter and flame sensor are doing that work night after night, and one of them wearing out is often what leaves the house cold.
Millard County has logged 32 winter storms and 39 damaging wind events over the past ten years, and across Utah about 7% of households went at least 24 hours without power in 2024. A furnace that will not restart once power comes back on is a common way that shows up, usually on the coldest nights of the year.
- 8 months
- October through May, your furnace is on duty
- 20°F
- the average winter night it heats against
- 68%
- of homes here heat with gas, so most furnaces here burn gas
- 32 winter storms
- in ten years, the nights a failure hurts most

NOAA nClimDiv, 1991–2020 normals
A new furnace would cut about $100 a year off heating for a typical Millard County home.
Estimates for a typical Millard County home, compared with an older unit built to the previous federal minimum, from EIA household energy data, Utah fuel prices and NOAA climate normals. Your home will differ.
Repair makes sense when one part has failed and the heat exchanger is sound.
Replacement makes sense when the heat exchanger is cracked or the furnace keeps needing parts.
Utah requires HVAC contractors to hold a state license.
That license belongs to the contractor, not to any single job, so the same license that covers this furnace repair would cover any other HVAC work that contractor takes on. Work under $7,000 does not need a licensed contractor in Utah, so a smaller repair can fall outside this rule.
A furnace repair means someone is working with a gas connection, and a bad one is the part of the job that can hurt someone. In Millard County, 67.8 percent of homes heat with gas, so that connection is a detail worth caring about here.
Sources: Utah State Legislature · Utah Department of Commerce
- Why won't my furnace turn on?
- The most common reason is a problem with the thermostat, the power supply, or the gas supply to the unit. Check that the thermostat is set to heat and the temperature is above room temperature, and check the breaker for the furnace. If those are fine, the igniter or a safety switch inside the furnace may be the issue, and that calls for a contractor to check the unit itself. With winter lows here averaging 20°F, it is worth getting this looked at quickly.
- Why is my furnace blowing cold air?
- Furnaces blow cold air for a few seconds when they first start, before the heat exchanger warms up. If cold air keeps coming, the igniter may be failing to light the burners, or the thermostat fan setting may be set to on instead of auto, which pushes air through even when the burners are off. A dirty filter can also cause the furnace to shut off the burners while the blower keeps running. A contractor can tell which of these is happening in your furnace.
- Why won't my furnace pilot light stay lit?
- This usually means the thermocouple has worn out and is no longer sensing the pilot flame correctly, so the gas valve shuts it off as a safety measure. A draft blowing across the pilot, or a dirty pilot orifice, can also put it out. Most furnaces built in the last couple decades use an electronic igniter instead of a standing pilot, so if yours has one, the problem is likely with the igniter or flame sensor rather than a pilot at all. Either way, a contractor needs to check the part directly to know which one has failed.


