Remove thermostat from wallplate for 10 seconds, then reconnect it. No AC power to thermostat. System switch on thermostat in wrong position. Reset System switch.
Thermostat minimum-off times operating for cooling. Wait five minutes. Incorrect wiring. Check wiring. Consult equipment manufacturer instructions. Partial display. Inoperative thermostat. Replace thermostat. Still in installer setup mode. No display. No power to thermostat. Check power to thermostat. Thermostat mounted incorrectly on wallplate. Temperature display is incorrect. Reconfigure the display.
Cannot change temperature setting. The upper or lower temperature limits were reached. No power to the heating system. Check that there is power to the heating system. Fault in STC. Call Installer. Temperature controls are switched off or set too low. Check that the temperature controls in the system are set to appropriate levels.
Boiler or other system controls have malfunctioned. STC is counting down the number of days until your next boiler service is due. Arrange a boiler service before the counter reaches zero. Each service is normally a maximum of 1 year apart. Your boiler service is overdue.
Arrange an immediate boiler service. How reliable is 2-way RF communication? The 2-way RF communication also known as wireless communication used by Honeywell is extremely robust and reliable. When installed correctly the Signal Strength test feature allows the Installer to locate the system components where mutual signal reception is strong.
During communication, signals are sent several times to ensure receipt, and if any message is garbled, the error detection software recognises this and ensures the message is repeated again. What do I do if RF communication is lost? The most likely cause for loss of communications is the DT92E batteries running low on power. This will be indicated on the DT92E display by a flashing battery symbol, or the display may even be blank. Simply replace the batteries and wait a few minutes for communications to become re-established.
Check the direct path between the two devices and reposition any object that may be blocking the signal, or move the thermostat. How do I know when to change the batteries in the CS92A cylinder sensor? You can confirm this by pressing the CS92A button, whereupon the red light will give a brief flash every second to indicate a low battery state.
It is important to change the CS92A batteries as soon as the low battery condition is indicated, as reduced battery power may affect the RF signal strength and impair RF communications.
How do I know when to change the batteries in the DT92E room thermostat? DT92E will continue to operate for at least 4 weeks after the indicator begins to flash. It is important to change the DT92E batteries as soon as the low battery condition is indicated, as reduced battery power may affect the RF signal strength and impair RF communications.
The temperature measured by the thermostat is below the thermostat's display range. The thermostat has lost communications with the AQ control panel. The thermostat might be defective. The floor sensor may also be defective if the thermostat has been configured for F mode. Cooling or heating has stopped. When the thermostat has been configured for AF mode, floor will flash if the floor sensor is defective or not installed. The thermostat will still control the ambient air temperature but will ignore the floor temperature limits.
Display flashes during operation. Programming has been lost because of a power outage. You must reprogram. Program is lost due to power outage. Check that backup batteries are installed correctly. Replace if necessary. Reprogram the thermostat. Temperature change occurs. Check the program times for the period in question. Be sure that AM and PM indications are correct.
Make sure the current day and time are correct. Display flashes during programming. You have reached the temperature setting limit. Display will not come on.
Check that heat or cool system power is on. If you use batteries,. Make sure thermostat is correctly mounted on base. Allow time for the furnace to heat up and the fan to come on before checking for heat at the register. Cooling will not come on. The thermostat has a buitt-in time delay on cooling to protect the compressor.
Allow up to 10 minutes after changing the setting before the air conditioner starts. If temperature setting is lower than current temperature, and display says COOL ON, contact your heating and air conditioning contractor.
Heating will not come one. If temperature setting is higher than current temperature, and display says HEAT ON, contact your heating and air conditioning contractor. Low humidity. Furnace blower not operating. Rapid air changes. Beverage Dispenser Manuals.
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