Robertshaw thermostat troubleshooting

American thermostats Robertshaw are an excellent option for your home arrangement. The troubleshooting system presented in form of a table below will allow to reveal any malfunction in time and effectively remove it.

Robertshaw basic thermostat troubleshooting

SYMPTOMREMEDY
Thermostat does not turn on system.Check wiring.
(See INSTALLATION)
Check fuse. Replace with 3 amp fuse if fuse has opened.
Thermostat turns on and off too frequently.Increase temperature differential.
(See PROGRAMMING)
Display is blank, flashing or constant LO BAT.Replace batteries.
System fan does not operate properly.Move fan option switch to either gas or electric, to match system. (See INSTALLATION)
Time shown on display is not the current time of day.Change time of day setting. (See PROGRAMMING)
Thermostat does not follow program.Thermostat in MANUAL mode.
(See PROGRAMMING)
Thermostat may not have been programmed in HEAT or COOL position. Verify program.
Check AM/PM indicators at time of day and programmed time changes. (See PROGRAMMING)
Verify program and day of week is correct (See PROGRAMMING)
Thermostat does not advance day of week.To view or change day of week use method on page 5.

Robertshaw SlimZone Premier thermostat troubleshooting

PROBLEMPOSSIBLE CAUSESOLUTION
No heat/cooling in houseZone thermostat(s)Select heat, cool or auto mode of operation at thermostat
Faulty heating /cooling equipmentTroubleshoot equipment according to manufacturer's instructions.
Faulty thermostatRefer to instructions provided with the thermostat for verifying operations. Replace if necessary.
Faulty zone control panelFollow instructions outlined in Setup and Test. Replace if necessary.
No heat/cooling in zoneBalancing damper closedCheck all balancing dampers in the same duct as the motorized zone damper; closed balancing dampers should be readjusted.
Zone registers closedCheck all zone registers: closed registers should be readjusted.
Faulty thermostatRefer to instructions provided with the thermostat for verifying operations. Replace if necessary.

Robertshaw Rs series thermostat troubleshooting

ProblemAction
Thermostat does not turn on system.Check wiring (see Wiring Diagrams section).
System turns on too often.Increase temperature differential (see Changing: Scale, Clock Mode, Differential, Filter Hours, Short Cycle, or Offset section).
System fan does not operate properly.Move fan option switch to either gas or electric, to match system (see Switch Locations section).
Thermostat does not display proper room temperature.Check F/C (Fahrenheit/Celsius) setting. See Changing: Scale or Calibration section.
Display Shows HI or LO and room tem- perature is normal.Call a licensed service person to replace/repair.

Robertshaw RS31** series thermostat troubleshooting

ProblemSolution
No display1. Check batteries connections and batteries.
2. Remove the batteries and wait for about 1 minute, then replace batteries.
Entire display dims1. Replace batteries.
Auto fan does not turn on properly1. Move HG/HE selector to correct position.
Heating or cooling does not go on or off1. Check that the function switch is in the correct position (HEAT or COOL).
2. There may be as muchi as a 4-minute delay before 1he system turns on - wait and check (Compressor protection delay.)
3. Check your circuit breakers and switches to ensure there is power to the system.
4. Replace batteries.
5. Make sure your furnace blower door is closed properly.
6. If your non-heat pump system only uses 4 wires, be sure the jumper wire is installed between the Rh/B and Rc/O terminals.
7. Check the position of the selector switch: Standard or Heat Pump.
8. If you have single stage heat pump, be sure the jumper wire is installed between the Y and W terminals.
Erratic display1. Remove the batteries, hold any key then replace the batteries. Reprogram.
Unit continues to operate in the OFF position1. Replace unit.
Thermostat permanently reads HI, LO, or Er1. Replace unit.