Do you have a question about the 9620 and is the answer not in the manual?
Questions and answers
Bill
May 20, 2025
Why would the 9620 thermostat display have the whole thing on and nothing is working , changed batteries
1 comments:
Mr. Anderson
May 24, 2025
If the Robertshaw 9620 thermostat display is fully lit but not functioning even after changing the batteries, possible causes include:
1. Wiring issues – Check that wiring connections are secure and correct. 2. Blown fuse – Replace with a 3 amp fuse if it has opened. 3. Compressor short cycle protection – A five-minute delay may be in effect; press RESET to override (note: this will erase programming).
These steps should help identify and resolve the issue.
9620 DIGITAL PROGRAMMABLE THERMOSTAT ® ™ I N T E G R A T E D C O M F O R T S O L U T I O N S HEAT PUMP 7 Day Programmable 2 Heat / 2 Cool User’s Manual...
Table 1 if existing wiring does not directly match the labels. • If you have any questions about cross referencing the old terminal to the new label, reference your equipment installation manual, a licensed contractor, or call Robertshaw Tech Support (800) 445-8299. 4. Remove existing thermostat base from wall.
Contact your local waste management authority for instructions regarding proper dis- posal of the thermostat. If you have any questions, call Robertshaw tech- nical support at 1-800-445-8299. Step 2: Installing Model 9620 Thermostat...
3. Place AUTO-ON switch into AUTO position. 4. Remove the cover using a coin or screwdriver (Figure 2). FIGURE 2 5. Place thermostat against the wall at desired location. Make sure wires will feed through opening on base of thermostat. 6.
(Figure 4) matching the label to the corresponding terminal (see Wiring Diagrams below). Tighten screws. FIGURE 4 9620 WIRING SAMPLE #1 Typical heat pump with cool active reversing valve and auxiliary/emergency heat. 9620 WIRING SAMPLE #2 Typical heat pump with heat active reversing valve and auxiliary/emergency heat.
TERMINAL LEGEND - 9620 TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION 24VAC common connection For input of 24VAC common side of transformer System fault indicator connection For connection of system fault indicator (if present) 24VAC hot connection For input of 24VAC hot side...
Step 3: Testing the Thermostat WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY. CAUTION: D 50°F (10°C). T O NOT SWITCH SYSTEM TO COOL IF THE TEMPERATURE IS BELOW HIS CAN DAMAGE THE AIR CONDITIONING SYSTEM AND CAUSE PERSONAL INJURY COOL-OFF-HEAT-EM...
Step 4: Customizing Your Thermostat Set Time of Day, Day of Week, Temperature Differential, Residual Cooling 1. Press SET and PROG/MAN. SET PROG/MAN Release simultaneously. PROG AUX CHECK EMER SET PROG/MAN COOL-OFF-HEAT-EM AUTO - ON Press to change time of day. 2.
QuickSet™ Programming Mode QuickSet™ will program all 7 days of the week with the same program. PROG COOL-OFF-HEAT-EM AUX CHECK EMER SET PROG/MAN COOL-OFF-HEAT-EM AUTO - ON 1. Place COOL-OFF-HEAT-EM SET P in COOL or HEAT position. 2. Press and hold SET. Press the button.
Begin Programmed Operation 1. Place AUTO-ON AUTO - ON into AUTO. PROG AUX CHECK EMER COOL-OFF-HEAT-EM SET PROG/MAN COOL-OFF-HEAT-EM AUTO - ON SUMMER 2. Place COOL-OFF-HEAT-EM into COOL or HEAT, COOL-OFF-HEAT-EM depending on the season. 3. Press PROG/MAN button WINTER until indicator is in PROG position.
Manual Operation 1. Press PROG/MAN until indicator is in MAN position. PROG AUX CHECK EMER T PROG/MAN PROG SET PROG/MAN COOL-OFF-HEAT-EM AUTO - ON 2. Press to adjust temperature settings. Reset To reset the thermostat to factory preprogrammed conditions, press the RESET button located beneath the lower left corner of the display.
Troubleshooting SYMPTOM REMEDY Thermostat does not turn Check wiring. on system. (See Installing Model 9620 Thermostat) Check fuse. Replace with 3 amp fuse if fuse has opened. Five minute compressor short cycle protection maybe in effect. Press RESET to override. NOTE: This will erase programming.
Five-Year Limited Warranty Maple Chase Company warrants to the original contractor installer, or to the original consumer user, each new Robertshaw thermostat to be free from defects in materials and workmanship under normal use and service for a period of five (5) years from date of purchase. This warranty does not...
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Do you have a question about the 9620 and is the answer not in the manual?
Questions and answers
Why would the 9620 thermostat display have the whole thing on and nothing is working , changed batteries
If the Robertshaw 9620 thermostat display is fully lit but not functioning even after changing the batteries, possible causes include:
1. Wiring issues – Check that wiring connections are secure and correct.
2. Blown fuse – Replace with a 3 amp fuse if it has opened.
3. Compressor short cycle protection – A five-minute delay may be in effect; press RESET to override (note: this will erase programming).
These steps should help identify and resolve the issue.
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