Why is the temperature display not accurate on my ICM Controls SC 1800 Thermostat?
If the temperature shown on your ICM Controls Thermostat isn't correct, ensure the thermostat is set to your preferred temperature scale (Fahrenheit or Celsius) using the jumper. Also, make sure any openings behind the thermostat where wires pass through are sealed with non-flammable insulation or putty.
What to do if LCD is blank, or displaying LO BAT on ICM Controls SC 1800?
If your ICM Controls Thermostat's screen is blank or shows 'LO BAT', try replacing the batteries or ensuring the existing batteries are correctly installed.
How to fix ICM Controls Thermostat not turning on?
If your ICM Controls Thermostat isn't turning on, check the batteries. A blank display usually means the batteries are either missing or dead.
Why does my ICM Controls SC 1800 Thermostat turn on and off too frequently?
If your ICM Controls Thermostat is causing the system to cycle on and off too often, try adjusting the temperature differential. Refer to “Setting the Temperature Differential,” Page 8 for guidance.
What to do if ICM Controls Thermostat is not properly controlling the fan?
To resolve issues with your ICM Controls Thermostat not properly controlling the fan, check that the fan switch setting matches your system type (gas or electric).
Diagrams for single transformer, 3-wire and 2-wire heating-only systems.
Wiring diagrams for 3-wire and 2-wire zone valve/damper motor systems.
Procedure for adjusting the thermostat's desired temperature setting.
Instructions on adjusting temperature variance to control system cycling.
Steps to switch the temperature display unit from Fahrenheit to Celsius.
Initial setup steps for activating the thermostat's heating function.
Procedure to verify correct installation and basic system functionality.
Common symptoms and their remedies for thermostat operation issues.
General| Stages | 1 Heat / 1 Cool |
|---|---|
| Auto Changeover | Yes |
| Display | LCD |
| Backlight | Yes |
| Mounting | Horizontal |
| Power Source | 24 VAC or Battery |
| Operating Humidity | 5% to 90% RH (non-condensing) |
| Operating Temperature | 32°F to 122°F (0°C to 50°C) |
| Temperature Range | 45 to 90°F (7 to 32°C) |
| Compatibility | Heat Pump or Conventional Systems |
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