Instruction/ maintenance manual of the product 1F78 White Rodgers
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Installation Instructions for Heating & Air Conditioning 1F78 Non-Pr ogrammable Thermostat CONTENTS Preparations .................................................. 1 Thermostat Details ........................................ 1 Removing Old Thermostat .
MOUNTING AND WIRING Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur. CAUTION ! ATTENTION! This product does not contain mercury. How- ever, this product may replace a unit which contains mercury.
CHECK THERMOST A T OPERA TION www.white-rodgers.com 5 RH 24 VAC 120 VAC Hot Neutral THERMOSTAT SYSTEM G W Figure 2. Typical wiring diagram for heat only, 3-wire, single transformer systems TRANSFORMER.
CHECK THERMOST A T OPERA TION CONTINUED FROM THIRD PAGE www.white-rodgers.com Before you begin using your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base .
Symptom P ossible Cause Corrective Action No Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker . Replace fuse or reset breaker . (common prob lems) 2. Fur nace power s witch to OFF . T ur n s witch to ON. 3. Fur nace blo wer compar tment door or Replace door panel in proper position to engage panel loose or not properly installed.
Symptom P ossible Cause Corrective Action Heat, Cool or Fan Runs Constantl y . 1. P ossible short in wir ing. Chec k each wire connection to v er ify they are not 2. P ossible shor t in thermostat. shor ted or touching together . No bare wire should 3.
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If you already are a holder of White Rodgers 1F78, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime White Rodgers 1F78.
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