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MODEL OVERVIEW
About this model: Midea MAT10H2ZWT
MAT10H2ZWT 230 V heat/cool wall AC: exact Midea owner manual, controls and seven verified display faults.
Match the 230-volt heat and cool variant
The exact Midea listing calls MAT10H2ZWT a 10,000 BTU, 230 V through-the-wall air conditioner with electric heat. It claims heating and cooling for rooms up to 450 square feet and lists a 10,000/9,800 capacity figure. The housing is published as 20.28 inches wide, 24.21 inches deep and 14.35 inches high, with a listed weight of 70.56 pounds. Those figures help distinguish it from the smaller 115 V MAT08H1ZWT in the same owner-manual family; the voltage difference also matters for installation. The product is marked no longer available, so the manufacturer PDF and the actual unit label are especially useful when identifying an older installation. Its cover includes MAT10H2ZWT by name. Read the complete label, including H2, before treating any shared-family instruction as applicable.
Use the modes rather than guess from airflow
The manual's control chapter describes Auto, Cool, Dry, Heat and Fan modes, while warning that a typical illustrated panel can contain features absent on a particular family member. This product's own listing explicitly includes electric heat, so Heat is relevant here; cooling-only variants on the PDF cover should not be assumed to have it. In Auto, the controller chooses operation according to the selected and room temperatures. Fan Only moves air without a cooling request, and Dry is intended for dehumidification even though some cooling may continue. Temperature selection is bounded by the 62–86°F display range in the manual. The included remote can operate the appliance from across the room. A lack of compressor sound while Fan Only is selected is therefore a mode choice to check before looking for a fault code.
Interpret energy and remote controls carefully
The shared control instructions describe Energy Saver under Cool, Dry and eligible Auto modes. After the compressor stops, the fan runs briefly and then cycles at intervals rather than blowing continuously. This can make a normally working unit seem to stop and start. C-SENSE is described as a remote-only thermostat function: the remote measures temperature where it sits and sends a signal to the wall unit every three minutes. If the signal is missing long enough, the mode ends with a beep. Check the actual remote for its C-SENSE key because the family manual says some functions vary by model. The product page also describes automatic restart with recent settings after a power interruption. A filter reminder after 250 hours is maintenance, and timer or HI/LO readings are display statuses rather than the sensor codes.
Separate sensor messages from other faults
The display list on rendered page 32 names seven strings. AS and the lowercase-oS entry both say room-temperature sensor error; the manual does not give a more precise difference between them. ES identifies the evaporator temperature sensor, HS the electric-heating sensor, and CS the outdoor condenser sensor. E3 reports a stalled fan, while E0 reports failed EEPROM parameters. The letter o in oS is not the zero in E0. Photograph the exact characters and note whether the unit was in Heat, Cool or another mode. Do not diagnose a particular replacement part solely from these short labels. The same page says the unit may show room temperature in Fan Only and HI or LO at an extreme room reading, which should be kept separate from the seven error entries.
Respond within the manual's owner procedure
For each of the seven errors, Midea directs the owner to unplug the appliance and reconnect it, then call for service if the message returns. Perform that limited reset only if the plug is safely accessible and the unit shows no damage; a 230 V electrical supply and the sealed refrigerant system are work for qualified personnel. A cooling compressor may also remain off for about three minutes after a quick off/on command, while the fan continues, because the manual describes a protective delay. That pause alone is not E3. Check filter condition and the selected mode, record the code exactly, and tell service whether it recurred after the prescribed reset. The PDF's shared model list and current product page together are the basis for applying this code table to MAT10H2ZWT.
Verified model details
Exact 10,000 BTU / 230 V heat/cool variant
Source for this detailShared manual cover names MAT10H2ZWT
Source for this detailC-SENSE is remote-only where present
Source for this detailAS and oS share the manual's room-sensor label
Source for this detail
This description summarizes the linked source documents; check each cited source for your exact model and region.
Manufacturer source
Open official source
Midea 10,000 BTU 230V In-Wall Air Conditioner with Heat MAT10H2ZWT
Open official sourceIf there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.