Ann Arbor particulars
Ann Arbor runs its own heat pump rebate. The A2ZERO Home Energy Rebates, funded by the 2022 Community Climate Action Millage, list cold-climate heat pumps at up to $5,500 (market rate $4,000) and ductwork at up to $2,500, capped at 90 percent of cost. You must own or rent a home in the city, use a contractor, and supply a Manual J and an AHRI certificate for heat pumps. Checks arrive 6 to 8 weeks after approval, and the page carries no closure notice or date, so confirm it is open.
The Ann Arbor University of Michigan station shows about 6,501 heating degree days a year (base 65 F). DTE Electric and DTE Gas are the only electric and gas utilities whose territory covers the city, so DTE's furnace and heat pump pages apply as well. Mechanical permits go through STREAM, which the city calls its trade permit system, from Building, Rental and Inspection Services, 734-794-6263; allow 24 to 48 hours for review.
About 64.3 percent of homes predate 1980. For rentals, the city has adopted an ordinance requiring carbon monoxide detection in all rental properties. Ypsilanti is the closest neighbor. The heat pump page explains cold-weather performance.
Furnace repair in Ann Arbor: what to know
The Ann Arbor University of Michigan station counts about 6,501 heating degree days a year at base 65 F, a heavier load than the 6,067 we use for Detroit. DTE Gas is the only natural-gas utility whose territory covers the city, and 64.3 percent of homes were built before 1980. A repair quote on an old furnace can be a prompt to ask what the ducts look like as well.
A replacement is permitted through STREAM, the city's trade permit system, from Building, Rental and Inspection Services (734-794-6263). The city asks for 24 to 48 hours of review, and a trade permit tied to a building project is not released until the building permit is approved. Mechanical and electrical permits are separate. We can cite no Ann Arbor mechanical fee, so we print none; ask the building department.
Permits for furnace repair in Ann Arbor
LARA's rule says mechanical work needs a permit except for replacement of minor parts, so a repair that swaps a part generally does not, while replacing the furnace does (our interpretation of LARA's exemption list; confirm with LARA).
Furnace problems that cannot wait
- You smell gas: leave, then call 911 and your gas utility from outside.
- A carbon monoxide alarm is sounding: get into fresh air, call 911 and stay out until told it is safe (see the carbon monoxide guide).
- Several people have flu-like symptoms without a fever; SEMCO lists headache, fatigue, nausea and dizziness as carbon monoxide symptoms.
- No heat in freezing weather: see emergency HVAC repair.
- A furnace that heats but runs louder than it used to, with no gas smell and no alarm.
Three checks before you call
Try this first: ask whether the furnace trips on a limit or fails to light, since the two symptoms point to different parts.
- Set the thermostat to heat, above the room temperature, with fresh batteries if it takes them.
- Check the filter and change or clean it; ENERGY STAR says to do this monthly.
- If it still will not start, note any light pattern or code and stop. Do not remove panels or relight anything after a gas smell.
What furnace repair costs
The estimate below is the Michigan-wide one, adjusted for Michigan wages and not for Ann Arbor in particular. The same table is on the furnace repair page. How we estimate costs. Prices as of Oct 19, 2026.
| Item | Figure | What it is |
|---|---|---|
| Estimated range, diagnostic and minor part, not a quote | $105 to $550 per repair, diagnostic or minor part | A diagnostic visit and a small part such as an igniter, flame sensor or switch. Built from one national published range, adjusted by the Michigan HVAC technician wage ratio (1.00). |
| Estimated range, major component, not a quote | $200 to $1,300 per repair, major component | A control board, gas valve or draft inducer motor, with the diagnosis that finds it. Built from 3 national published ranges, adjusted by the Michigan HVAC technician wage ratio (1.00). |
| Estimated range, heat exchanger, not a quote | $500 to $2,500 per repair, heat exchanger | A cracked or failed heat exchanger, the repair most often compared with the price of a new furnace. Built from 3 national published ranges, adjusted by the Michigan HVAC technician wage ratio (1.00). |
| Technician wage, Michigan mean | $31.01 an hour | Technician pay (BLS, May 2025), not a price. |
| Furnace replacement permit, Grand Rapids | $21 plus a $52 application | Effective July 1, 2026; $73 by our addition. |
| Gas or oil furnace permit, Sterling Heights | $57 up to 75,000 BTU, plus $55 application | 2026-2027 form. |
| Heating system permit, Dearborn | $50 up to 75,000 BTU | Plus $100 administrative fee. |
| Residential furnace permit, Westland | $83 up to 75,000 BTU | Plus $100 administration fee. |
| Residential furnace permit, Warren | $80 | Form dated 4/25/2023; confirm with the city. |
| Residential heating system permit, LARA state | $50 plus a $75 application | Only where the state enforces the code. |
Estimated ranges, with a row for each size of repair. Built from national published ranges (4 sources in all, 1 to 3 per row), adjusted by Michigan's HVAC technician wage ratio to the US (1.00, BLS May 2025), plus the local permit fee where the city publishes one. Not a quote. We have too few Michigan company prices yet to show a range. Full method.
Questions about furnace repair
What is the average lifespan of a furnace?
The federal and ENERGY STAR pages we cite give none. ENERGY STAR does say equipment more than 10 years old should be evaluated by a professional HVAC contractor, which is a reason to ask for an inspection and gives no expiry date.
How much does furnace repair or a service call cost in Michigan?
The first row of the cost table is a statewide estimate, a model and not a quote. The rows below show technician wages, a Michigan mean of $31.01 an hour (BLS, May 2025), which is pay, not a charge. Ask what the visit fee covers and get the repair price in writing before work starts.
What is the $5,000 rule for furnaces?
Contractors and homeowners pass it around, but no federal or state page we cite states it. The repair-or-replace tool shows it only as a labeled rule of thumb; ENERGY STAR's 10-year evaluation advice is the sourced alternative.