AC Maintenance & Tune-Ups in Willis, Michigan

Here is what a Willis AC maintenance visit looks like from Temprasure: the condenser top comes off and the coil gets washed from the inside, the run capacitor gets a meter on it and a number written down, the contactor gets inspected, the refrigerant charge gets verified by superheat and subcooling, the drain gets flushed and the float switch gets tested. Then you get a plain-English summary. We do this for homes around Paint Creek, through Hitchingham Road area, and everywhere else in 48191, and we would rather see you once in spring than twice in July.

Willis houses and what that means for ac maintenance

The typical Willis house is a 1950s–80s ranch on a crawlspace or a shallow block basement, built by a farm family or an auto worker on a piece of split-off land, and heated by a furnace that has been replaced once or twice without anyone enlarging the ductwork. Many of these were originally on fuel oil, and we still find abandoned oil tanks in basements and oil-to-gas conversion furnaces that are long past their design life. The farmhouses along Bunton and Tuttle Hill Roads are 1870s–1920s two-stories with Michigan basements and a forced-air system threaded in after the fact, usually with cold upstairs bedrooms as the result. Scattered 1990s–2010s acreage homes are colonials and ranches on full basements with 80 or 90 percent furnaces, more often propane than natural gas. Manufactured and modular homes are a larger share of the housing here than in the rest of the county, and their package units and small downflow furnaces are a regular part of our work.

Tree cover is what makes Willis condensers so dirty by midsummer. Mature cottonwoods, maples and the lawn being mowed on the AC side of the house pack the coil fins with fluff and clippings by the end of June, and a condenser that cannot shed heat runs at higher pressure, draws more current from DTE Energy, and cooks its own compressor. We wash the coil from the inside out on every Willis maintenance visit rather than hosing the outside, which just drives debris deeper into the fins. For homes near Paint Creek where the trees are oldest, we often suggest a second quick rinse in early July, and we show homeowners how to do it safely.

Willis is 10 miles out from the shop, which on a July afternoon means a 18-minute run down the road with the condenser fan motors and capacitors already loaded. We see the same pattern every summer in the 1950s–80s rural ranches and farmhouses with scattered 2000s builds around Rawsonville Road north toward Bemis and Willis Road east toward Sumpter: systems that were never designed for 90-degree dew-point afternoons, pushed hard from the first humid week of June, and losing a capacitor or a contactor right around the time Washtenaw County issues its first heat advisory. Homes near the Willis Post Office and out toward the Augusta-Sumpter township line sit on DTE Energy service, so when the grid sags at 5 p.m. we check start amps before we ever touch the refrigerant.

Local details we plan around in Willis

• Abandoned fuel-oil tanks and oil-era chimneys are common in the older ranches, and venting a new gas furnace into one of those chimneys often requires a liner.
• DTE gas follows Rawsonville Road and Willis Road through the crossroads, but most side roads are propane-only, and we confirm fuel type before quoting any equipment.
• Spring flooding in crawlspaces near Paint Creek is routine, so we recommend elevating any furnace or water heater that sits below grade.
• Willis is as flat as anywhere in Washtenaw County, and drainage is slow enough that ditches and field tiles run most of the spring. Crawlspaces near Paint Creek and along the lower stretches of Bunton Road stay wet into June, and that moisture finds its way into ductwork and furnace cabinets. Winter wind crosses the fields unbroken, and summer brings long humid stretches with little shade outside the old farmstead windbreaks.