Furnace, air conditioner or heat pump not doing its job? Confluence Heating & Air diagnoses and repairs residential heating and cooling systems across Dayton and the Miami Valley. Call the local line, describe what the system is doing, and we will set up a visit.
Tell us what the Dayton property is doing and we'll take a look.
Most Dayton houses run a gas furnace in the basement with a split-system air conditioner sharing the same blower and ductwork. A growing number run a heat pump instead, either as the whole system or paired with a gas furnace as a dual-fuel setup. HVAC repair means diagnosing and fixing whichever of those has stopped heating, stopped cooling, or started doing either badly: short-cycling, running constantly, tripping breakers, leaking water, or making a noise it did not make last month.
The repair side of the trade is mostly a small set of parts that fail in predictable ways. On the furnace: hot-surface igniters, flame sensors, pressure switches, inducer motors, control boards, blower motors and capacitors, and, on older units, the heat exchanger itself. On the air conditioner: capacitors, contactors, condenser fan motors, refrigerant leaks at the coil or line set, and compressors. On a heat pump, add the reversing valve and defrost control. Knowing which of these is likely, based on the symptom and the equipment's age, is what makes a diagnosis fast and a repair correct the first time.
What a repair should never be is a guess. The technician measures before touching anything: temperature rise across the furnace, static pressure in the ducts, amp draw on the motors, refrigerant pressures and superheat or subcooling on the AC, and combustion readings on gas equipment. Those numbers tell you what actually failed, and they go in the write-up so you can see them.
Dayton's climate is a two-sided problem. NOAA's 1991-2020 normals put the airport at roughly 5,645 heating degree days and about 900 cooling degree days a year, with about 109 nights at or below freezing. The furnace carries most of the load and runs long cycles from November through March. The air conditioner sits idle for seven months, then gets asked to pull humidity out of the air on 84-degree July afternoons. Equipment that sits does not age gracefully: capacitors drift out of tolerance, contactors pit, and refrigerant that was marginal in September is short in June.
The other half is the houses. The city of Dayton's median home was built around 1951 according to the 2020-2024 American Community Survey, and about three quarters of its housing predates 1970. That means original or patched ductwork, undersized returns, and basements that were never meant to be conditioned space. High static pressure from restrictive ducts is behind a large share of blower motor failures, cracked heat exchangers and frozen evaporator coils in this region. A repair that replaces the failed part without addressing the airflow problem that killed it will be repeated in a few years.
Fuel matters too. About two thirds of homes in Montgomery County heat with utility gas. Gas furnace repair is, in part, combustion safety work: a cracked heat exchanger or a blocked flue is a carbon monoxide problem, not a comfort problem, and the diagnosis has to include those checks every time.
Before the visit is scheduled, you are told the diagnostic fee and asked a few questions: what the system is doing, whether anyone is without heat or cooling, the equipment brand and age if you know it. On arrival the technician confirms the complaint with you, then goes to the equipment and takes measurements. If the failed part is on the truck, which for common igniters, capacitors, motors and boards it usually is, you get a quoted price for the repair before it is done.
If the diagnosis turns up something bigger, a failed compressor, a cracked heat exchanger, a refrigerant leak inside a coil on an older R-22 system, you get two numbers: what the repair costs and what a replacement would cost, with the reasoning for each. Nobody on this side of the conversation pushes one or the other. A furnace under twelve years old with a bad inducer motor should be repaired. A twenty-two-year-old furnace with a cracked exchanger should not.
Once the repair is done, the system runs through a full cycle and gets re-measured. Temperature split, static pressure and amp draws are checked against what they should be, and you get a short summary of what was found, what was replaced, and anything to watch.
Three things decide it. First, age: gas furnaces in this climate typically give fifteen to twenty-five years, air conditioners twelve to eighteen, and a unit at the top of that range with a major failure is a poor candidate for a large repair. Second, the failed component: igniters, capacitors, motors and boards are ordinary wear; heat exchangers, compressors and coil leaks are structural. Third, the fit: if the current unit was oversized for the house or fights a bad duct system, replacing it with a properly sized unit fixes the comfort problem that the repair never would.
You get both quotes in writing and the reasoning behind them. Replacement estimates are free and are based on a load calculation for your house, not the tonnage on the old nameplate.
Questions
Yes. Residential gas furnaces, split-system air conditioners and heat pumps from the major manufacturers use largely interchangeable parts: igniters, capacitors, motors, contactors and boards. Some control boards and proprietary parts have to be ordered, and you are told that before the repair is quoted.
The usual suspects are a failed run capacitor (the outdoor fan or compressor does not start), low refrigerant from a leak, a dirty or frozen indoor coil, or a restricted filter. The technician measures pressures and temperature split to tell which. If the coil is frozen, turn the system to fan-only so it thaws before the visit.
The diagnostic fee is quoted up front and applied toward the repair when the work is done on the same visit.
Sometimes the symptom narrows it down, and whoever answers will tell you what it sounds like and what to check. A firm diagnosis needs measurements at the equipment, which is what the visit is for.
Call the local line or send the form, and we will get back to you to set up a visit.
Request a free estimate Call (937) 719-5148