The White Rodgers 1F92-71 is a premium universal multi-stage heat pump digital 5/2 day programmable thermostat for multi-stage heat pump systems, including up to 3-stage heat/2-stage cool with aux/emergency heat, automatic/manual changeover. It features independent heating/cooling programs with 4 time/temperature settings per day, Computed Energy Management Recovery (EMR), and battery backup with 3 AA batteries. Powered by 24 VAC (requires hot and common); compatible with systems up to 1.5A total load. Below are the key specifications, installation, operation, programming, and troubleshooting instructions.
Assemble tools: hand or power drill with 3/16 inch drill bit (if needed), flat blade screwdriver, wire cutter/stripper, level, voltmeter. Shut off electricity at main fuse box until installation complete. Label wires before disconnecting. This thermostat is for 24V systems only; requires both hot and common. Install about 5 ft. above floor on inside wall, away from drafts, direct sunlight, heat sources, windows, doors, registers, poor circulation areas.
WARNING! Failure to read and follow all instructions carefully before installing or operating this control could cause personal injury and/or property damage. Save these instructions.
Wall-mounted, low voltage thermostat for precise multi-stage heat pump control. Microcomputer-based with 5+2 day programming, 4 periods/day, independent heat/cool programs. Features LCD display alternating time/room temp, up/down arrows, SYSTEM switch (HEAT/OFF/COOL/AUTO/EMER), FAN switch (ON/AUTO), PRGM switch, option switches for changeover/EMR/lockout. Terminals: G (fan), C (common), R (hot), O (cool changeover), B (heat changeover), Y1/Y2 (compressor stages), W1/W2/W3 (aux heat stages). Supports multi-stage heat pumps with/without aux/emergency heat.
Applications: Multi-Stage Heat Pump: Yes (up to 3H/2C); Conventional Multi-Stage: Yes; Heat Only: Yes; Cool Only: Yes; Gas/Oil/Electric/Hydronic: Yes; Millivolt: No.
CAUTION! To prevent electrical shock/equipment damage, disconnect power at main fuse/circuit breaker until installation complete. Label wires prior to disconnection.
WARNING! Do not use on circuits exceeding 30 VAC 50/60 Hz (1.5A max total); higher voltage damages control/causes shock/fire. Do not short terminals on gas valve/primary control to test; short/incorrect wiring burns out components/causes injury/property damage. Conform to NEC Class II circuits. Do not operate cooling below 50°F (compressor damage).
ATTENTION! This product does not contain mercury but may replace one that does. Do not open mercury cells; if damaged, wear non-absorbent gloves, clean up spilled mercury, place in sealed container. Refer to www.thermostat-recycle.org for disposal.
Shut off electricity, verify with voltmeter. Remove cover, wall plate. Label wires with terminal designations (use provided labels for G,C,R,O,B,Y1,Y2,W1,W2,W3). Disconnect one at a time; pull 6 inches out; do not let fall into wall.
Program with batteries before mounting. Pull wires through subbase, connect to terminals. Place subbase over hole, mark/drill/fasten with screws (level). Push excess wire in, seal with fire-resistant material. Attach thermostat by aligning and snapping.
Batteries: Install 3 AA alkaline; low battery indicator flashes.
Terminal Designations: G (fan), C (common), R (24V hot), O (cool changeover), B (heat changeover), Y1 (stage 1 compressor), Y2 (stage 2 compressor), W1 (stage 1 aux heat), W2 (stage 2 aux heat), W3 (stage 3 aux heat).
Multi-Stage Heat Pump: R to hot, C to common, G to fan, Y1/Y2 to compressor stages, O/B to changeover (O for cool, B for heat), W1/W2/W3 to aux/emergency heat stages.
CAUTION! Requires R and C connected. Refer to equipment manuals for specifics. Tighten terminals securely.
Restore power. Set to manual changeover for testing. Override 5-min compressor lockout by holding PRGM + TEMP at startup if needed.
CAUTION! Do not operate below 50°F.
5+2 day; 4 periods (MOR/DAY/EVE/NHT). Independent heat/cool programs. Factory preprogrammed; program with batteries installed.
Factory Heat: MOR 6AM 70°F, DAY 8AM 62°F, EVE 6PM 70°F, NHT 10PM 62°F. Cool: MOR 6AM 78°F, DAY 8AM 85°F, EVE 6PM 78°F, NHT 10PM 82°F.
Set option switches on back before installing. Remove batteries when changing Group B.
| Group | Option | Default | Options | Comments |
|---|---|---|---|---|
| A | Keypad Lockout | Off | Off/Limited/Total | Limited allows temp adjust only |
| B | Changeover | Auto | Auto/Manual/Heat Only/Cool Only | Auto: 3°F deadband |
| B | EMR | On | On/Off | Computed early recovery |
For power failures, defaults to 64°F heat/82°F cool if program lost.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Display Blank | Power loss; dead batteries. | Check R/C wiring; replace 3 AA batteries. |
| Battery Indicator Flashing | Low batteries. | Replace 3 AA; program retained. |
| No Heat/No Cool | Wrong mode; setpoint; wiring; no R/C. | Set mode; adjust setpoint; verify wires/R C connected. |
| Fan Not Running | No G wire; AUTO no call. | Check G; set ON. |
| Short Cycling | 5-min lockout. | Wait; override for testing: hold PRGM + TEMP at startup. |
| Program Lost | Extended power failure without batteries. | Reprogram; defaults to 64/82°F. |
| Stages Not Activating | Setpoint differential not met; config. | Adjust setpoint 1°/3°/5°; check option switches. |
| Emergency Heat Not Working | Not in EMER mode; wiring. | Set SYSTEM EMER; check W1/W2/W3 wires. |