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Patricia BergAug 10, 2025
What to do if my ClimateMaster ATM11C11 shows 'E4'?
- JJonathan MartinezAug 10, 2025
If your ClimateMaster Thermostat displays 'E4', it indicates a memory failure. In this case, the thermostat needs to be replaced.
To Next PageTo Next PageWhat to do if my ClimateMaster ATM11C11 shows 'E4'?
If your ClimateMaster Thermostat displays 'E4', it indicates a memory failure. In this case, the thermostat needs to be replaced.
Why does my ClimateMaster ATM11C11 Thermostat display '--'?
If the room temperature sensor fails on your ClimateMaster Thermostat, the temperature display will show '--'.
This document provides submittal data for a range of commercial thermostats designed for water-source heat pump systems, offering various levels of control and programmability.
The ATM11C11 is a single-stage, non-programmable thermostat for 24V water-source heat pump systems. It features a manual changeover for heating and cooling. The thermostat is white and includes integral switches for system and fan mode control. Its vented cover aids in improved temperature sensing, and it can be mounted directly on a wall or a horizontal outlet box using a mounting plate. Electronic sensing is used, eliminating the need for mercury bulbs or bi-metal switching. Users can select the system mode (OFF, HEAT, or COOL) and set the fan to continuous ON or AUTO. Temperature adjustments are made via a simple increase/decrease mechanism.
The ATA11U03 is an electronic thermostat offering single-stage heating/cooling and two fan speed selections. It is non-programmable with auto/manual changeover capabilities. Key features include Heat-Off-Cool-Auto system selections and Fan Low or High selections, along with Fan-On-Auto options. The display can show temperature in either °F or °C and features a backlight that users can select. Installer setup options allow for extensive customization, such as dead band adjustment, temperature display offset, manual heat-cool only mode, keypad lockout, and the choice between onboard or remote sensing. Users can also set maximum cycles per hour, fan speeds (2 or 1), and define minimum cooling and maximum heating temperatures. The thermostat boasts zero temperature droop performance, and setpoints are permanently held in memory without batteries, ensuring retention during power outages. Its backplate wiring design facilitates easy installation. The mode key allows users to switch between heat, cool, and auto settings, while the ▲ or ▼ keys adjust the temperature.
The ATA22U01 is an electronic thermostat providing two-stage, non-programmable temperature control for 24V water-source heat pump systems. It supports two heat and two cool stages with manual/auto changeover. System selections include Heat-Off-Cool-Em Heat-Auto, and fan options are Fan-On-Auto. The display can show temperature in °F or °C, and the changeover operation can be configured as automatic or manual. An LED indicates alarm status. Installer setup options allow for customized applications, including extended fan operation (90 seconds after "Y" turns off), display of "current room temp" or "current setpoint," and optional safety setpoints to ensure heating and cooling even in "Off" mode. Backplate wiring simplifies installation. Automatic fan staging is available when used with a DXM board and direct drive motor. The thermostat offers zero temperature droop performance and a temperature display adjustment feature for custom applications. Setpoints are permanently held in memory without batteries, ensuring retention during power outages. The display updates every 12 seconds, and autochangeover models have a minimum differential of 3°F [1.5°C].
The ATP21U01 is a programmable thermostat designed for 24V water-source heat pump equipment, offering two stages of heating and one stage of cooling. It supports manual changeover and features 5-day/2-day programming with four periods per day. Users can select °F or °C temperature display and set individual heat and cool setpoints. The thermostat provides zero temperature droop performance and convenient overrides for temporary setpoint changes. Setpoints are permanently held in memory without batteries, ensuring retention during power outages. A room temperature offset adjustment is available, and back-plate wiring connections simplify installation. The MODE, PROGRAM, and HOLD keys allow users to make changes to the program and schedule.
The ATP32U03 is a programmable thermostat for 24V water-source heat pump equipment, providing three stages of heating and two stages of cooling. It features 7-day programming with four periods per day. The display can show temperature in °F or °C, and users can choose between a 12 or 24-hour clock. Individual heat and cool setpoints are supported, along with zero temperature droop performance. The thermostat operates in automatic (program mode) or manual (HOLD) mode. A Night Setback mode can be initiated by an external signal when using a DXM controller. Convenient overrides allow for temporary setpoint changes. Setpoints are permanently held in memory without batteries, ensuring retention during power outages. A room temperature offset adjustment is available. Progressive Recovery anticipates the time needed to reach the next programmed event, bringing on the heat pump accordingly. A large backlit dot matrix display activates for 25 seconds whenever a key is pressed. Menu-driven programming is facilitated by five navigation buttons (UP/DOWN/LEFT/RIGHT/SELECT). Fault indication is provided with a red backlight display. Configurable service interval messages and servicing contractor contact information are available. Keypad lockout is included. Back-plate wiring connections simplify installation. Exclusive fault identification (when used with CXM or DXM) displays faults from the CXM/DXM board (e.g., condensate overflow) and suggests possible causes. It is compatible with optional AST008C sensors for remote and/or outdoor sensing, and ASW06 for indoor wall-mounted remote sensing. Automatic fan staging is available when used with a DXM board and direct drive motor.
The ATP32U04 is a programmable thermostat for 24V water-source heat pump equipment, offering three stages of heating, two stages of cooling, and integrated temperature/humidity control. It supports 7-day programming with four periods per day. The dehumidification output is designed to work with Whole House Dehumidification Modulating Reheat options or ECM fan motor dehumidification mode. It provides integrated control of both temperature and relative humidity, eliminating the need for separate thermostats and dehumidistats/humidistats. The thermostat can be programmed to use humidification output to control a humidifier. A Night Setback mode can be initiated by an external signal when using a DXM controller. Convenient overrides allow for temporary setpoint changes. Setpoints are permanently held in memory without batteries, ensuring retention during power outages. A room temperature offset adjustment is available. Progressive Recovery anticipates the time needed to reach the next programmed event, bringing on the heat pump accordingly. A large backlit dot matrix display activates for 25 seconds whenever a key is pressed. Menu-driven programming is facilitated by five navigation buttons (UP/DOWN/LEFT/RIGHT/SELECT). Fault indication is provided with a red backlight display. Configurable service interval messages and servicing contractor contact information are available. Keypad lockout is included. Back-plate wiring connections simplify installation. Exclusive fault identification (when used with CXM or DXM) displays faults from the CXM/DXM board (e.g., condensate overflow) and suggests possible causes. It is compatible with optional AST008C sensors for remote and/or outdoor sensing, and ASW06 for indoor wall-mounted remote sensing.
The AST008C sensor is a thermistor accessory for thermostat models ATP32U03C and ATP32U04C. It provides outdoor air temperature information for the control system and displays it on the thermostat screen. The AST008C can also function as a remote indoor sensor. Two sensors can be used simultaneously: one for remote indoor temperature sensing and one for outdoor temperature sensing. When used as a remote indoor sensor, the thermostat's internal sensor becomes inactive without requiring thermostat reconfiguration. It is designed for both indoor and outdoor installation and includes a mounting clip. The sensor connects to the thermostat via a two-wire connection, extendable up to 200 feet with two-conductor 22 AWG thermostat wire.
General| Power Source | 24VAC |
|---|---|
| Temperature Resolution | 1°F (0.5°C) |
| Backup Heat Control | Yes |
| Display | LCD |
| Programmable | Yes |
| Fan Control | Yes |
| System Mode | Heat, Cool, Off, Auto |
