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Open 24 hours · No overtime charge nights, weekends or holidaysServing 20 miles around Ypsilanti, MI · Flat-rate pricing

Heat Pump Repair in Ypsilanti and Southeast Michigan

Outdoor unit iced solid, house running on expensive backup heat, or no cooling in July? We repair air-source heat pumps year-round, every brand, at one flat rate.

Heat pumps have gone from rare to common in Washtenaw and western Wayne County in the past few years, pushed along by DTE rebates, the federal 25C credit and a new generation of cold-climate equipment that actually heats a house at zero degrees. That means a lot of homeowners own equipment nobody around them has owned before, and when it misbehaves in January they are not sure whether it is broken or just doing something normal. Temprasure repairs air-source heat pumps of every brand, standalone units with electric backup and dual-fuel systems paired with a gas furnace, and we will tell you honestly which category your problem falls into.

Winter is when heat pumps surprise people. A heat pump heating a house in 20-degree weather pulls heat out of outdoor air, and the outdoor coil frosts over doing it. Every so often the system reverses itself for a few minutes to melt that frost, which is why you see steam rising off the unit and feel cool air from the vents for a moment. That is normal. What is not normal is an outdoor unit that stays coated in an inch of ice, a system that never comes out of defrost, a reversing valve that sticks so the house gets cold air all the time, or a defrost board or sensor that fails and leaves the backup heat strips or the gas furnace doing all the work while the DTE bill doubles. Those are repairs, and we carry the boards, sensors, contactors, capacitors and fan motors for them.

Summer failures look like any air conditioner's: a dead run capacitor, a pitted contactor, a seized condenser fan, low refrigerant from a coil leak, a clogged condensate drain. The difference is the refrigerant circuit has a reversing valve, an accumulator and often two metering devices, and the charge has to be checked against the manufacturer's heating or cooling chart depending on the season. R-410A systems from the last 15 years and the R-454B units installed since 2025 both get the same care: superheat and subcooling measured on a running system, not a pressure glanced at from the driveway.

Dual-fuel systems add a control problem on top of the mechanical ones. A heat pump paired with a gas furnace is supposed to hand off to the furnace below a set outdoor temperature, usually somewhere between 25 and 35 degrees depending on the equipment and the DTE rate, and the thermostat or an outdoor sensor manages that switch. When it is set wrong, the house either runs the heat pump into single digits where it struggles, or runs the furnace on 40-degree days where the heat pump would be cheaper. We check and correct the balance point on every dual-fuel repair, because a system that works but is staged wrong is costing you money every day.

Pricing on heat pump repair follows our usual rules. A flat dispatch fee covers the trip and the diagnosis and is credited toward the repair. The repair is quoted as a flat rate before work starts. Nights, weekends and holidays cost the same as a weekday. If the honest answer is that a 15-year-old builder-grade heat pump has a failed compressor, we will give you the repair number and a free replacement estimate side by side and tell you which we would choose.

Signs it is time to call

Outdoor unit encased in ice

A light frost that clears every half hour or so is normal. A thick shell of ice that never melts means the defrost cycle has failed. Switch to Emergency Heat and call.

Cold air from the vents in heating mode

Heat pump supply air is cooler than furnace air, around 90 to 100 degrees, but it should not be cold. Cold air all the time points to a stuck reversing valve, low charge or a failed compressor.

Electric bill doubled in winter

The heat pump has quietly handed off to the backup strips. A failed defrost board, a bad outdoor sensor or a refrigerant problem is usually behind it.

Furnace running constantly on a dual-fuel system

If the gas furnace carries the house on mild days, the balance point or the outdoor sensor is wrong, or the heat pump has failed and the system fell back silently.

No cooling in summer

Same as any air conditioner: capacitor, contactor, fan motor, low charge or a clogged drain. The reversing valve adds one more possibility.

Short cycling or loud startup

A compressor that stutters at startup or a unit that runs two minutes and stops has a capacitor, contactor, pressure switch or charge problem that gets worse quickly.

Loud whoosh or hiss every few minutes

A brief whoosh at defrost is normal. Constant hissing or a loud whoosh every couple of minutes means the reversing valve is cycling or leaking internally.

Thermostat shows Aux or Emergency Heat on its own

The system has decided the heat pump cannot keep up. On a mild day, that is a failure, not a feature.

How the visit goes

  1. Describe what it's doing

    Ice, cold air, high bills, no cooling. We will tell you whether to switch to Emergency Heat or shut it off, and give you a real arrival window.

  2. Heat-pump-specific diagnosis

    Defrost board and sensor test, reversing valve operation, contactor and capacitor readings, compressor and fan amp draw, charge verified by the correct seasonal chart, backup heat and balance point checked.

  3. Flat-rate quote before any work

    We show you the failed component and quote one number. Same rate at night and on weekends.

  4. Repair from the truck

    Defrost boards, outdoor sensors, contactors, capacitors, fan motors and refrigerant ride with us. Reversing valves and compressors are ordered for your specific unit.

  5. Verify through a full cycle

    In winter, we watch a defrost cycle complete and confirm the backup heat stages correctly. In summer, we verify temperature split and subcooling. Dual-fuel systems get the changeover tested.

  6. Honest next steps

    If the unit is near the end of its life, we say so and give you a free replacement estimate, with rebate information if a new system would qualify.

What this covers

  • Defrost control board and defrost sensor replacement
  • Reversing valve and solenoid diagnosis and replacement
  • Contactor, capacitor and relay replacement
  • Outdoor fan motor and indoor blower motor replacement
  • Refrigerant leak search and recharge on R-410A and R-454B systems
  • Charge verification by seasonal superheat and subcooling
  • Compressor hard-start kits and compressor replacement
  • Electric backup heat strip, sequencer and limit repair
  • Dual-fuel balance point and changeover correction
  • Outdoor temperature sensor replacement
  • Condensate drain, pan and float switch repair
  • Thermostat configuration for heat pump and dual-fuel operation
  • Low-voltage wiring and control repair
  • Repairs on every brand of residential air-source heat pump

How pricing works

Heat pump repair begins with a flat dispatch fee that covers the trip and a complete, season-appropriate diagnosis, and that fee is credited toward the repair if you approve it. Repairs are quoted as a flat rate per job before work begins, so a defrost board is one price, a contactor another, and the number you approve is the number on the invoice regardless of time spent.

Defrost sensors, capacitors, contactors and balance-point corrections are the least expensive heat pump repairs. Defrost boards and fan motors sit in the middle. Reversing valves and compressors are the two repairs that can approach the cost of a new outdoor unit on an older system, and when you are facing one of those we put a free replacement estimate next to the repair price, including whether a new unit would qualify for DTE rebates and the federal 25C credit.

There is no extra charge for nights, weekends or holidays. A heat pump iced over on a Sunday in January costs the same to repair as one on a Wednesday in October.

From the people we have helped

★★★★★

Temprasure is one of the best-managed companies I've ever come into contact with. Not only did Al do a great job but he did so in a timely manner. He worked as if it was his home in need. I would recommend him to anyone who has heating and cooling needs.

Trale W. · Google review, 2019
★★★★★

Al & Co. came out and took very good care of me and my family. He showed up within an hour of me making contact and was able to diagnose and take care of the problem quickly and for reasonable pricing.

Kareem L. · Google review, 2024
★★★★★

Al is very polite and professional. Is willing to answer any questions you may have. I would recommend Temprasure to 10/10 people looking for HVAC work.

Devon P. · Google review, 2019

Questions we hear most

Is it normal for my heat pump to steam and blow cool air in winter?

Yes, briefly. Every so often the system reverses to melt frost off the outdoor coil, which makes steam outside and a few minutes of cool air inside while the backup heat covers. If it happens every few minutes or the unit never clears the ice, that is a defrost problem and worth a call.

My heat pump is covered in ice. What do I do?

Switch the thermostat to Emergency Heat so the backup carries the house, and call us. Do not chip at the ice or pour hot water on the coil. The defrost board, defrost sensor or reversing valve has usually failed, and all three are repairs.

Why is my electric bill so high this winter?

Most likely the heat pump has handed off to the electric strip heat, which costs several times as much to run. That happens when the defrost system fails, when refrigerant is low, or when the outdoor sensor or thermostat is misconfigured. We find which and fix it.

Do you repair heat pumps that are paired with a gas furnace?

Yes. Dual-fuel systems are common in our area. We repair the heat pump, confirm the furnace is healthy, and verify the balance point so the system switches to gas at the right outdoor temperature for the DTE rates.

Can a heat pump really heat a house in a Michigan winter?

Modern cold-climate units can, down to well below zero, though output drops as it gets colder. Older or builder-grade heat pumps lose capacity fast below about 25 degrees and lean on backup heat. If yours is struggling on a 30-degree day, something is wrong.

What is a reversing valve and why does it fail?

It is the valve that switches the refrigerant flow between heating and cooling. The solenoid can fail electrically, or the valve can stick internally. A stuck valve leaves the system in one mode, so you get cooling in January or heating in July. It is a bigger repair than a board, and we will tell you if it is worth doing on your unit.

Do you repair every brand of heat pump?

Yes. Carrier, Bryant, Lennox, Trane, American Standard, Goodman, Amana, Rheem, Ruud, York, Bosch, Daikin and the rest. The components are largely universal and we stock the ones that fail.

Should I repair or replace an old heat pump?

Board, sensor, contactor, capacitor and motor repairs are worth doing at any age. A compressor or reversing valve on a unit over 12 to 15 years old usually tips toward replacement, especially since new cold-climate equipment qualifies for rebates and tax credits. We show you both numbers.

Do you charge more for heat pump repair at night or on weekends?

No. Same dispatch fee, same flat-rate repair, 24 hours a day, every day.

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Call or text (313) 701-9471 and tell us what the system is doing. We'll give you a real arrival window and a flat-rate quote before any work starts.

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