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Install Guide - Page 27

For UNP310.

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27
8. TROUBLESHOOTING
Symptom Possible Cause Corrective Action
NoHeat/NoCool/NoFan
(common problem)
1.Blownfuseortrippedcircuitbreaker
2. Furnace power switch to OFF
3.Furnaceblowercompartmentdooror
panel loose or not properly installed
4.Looseconnectiontothermostator
system
1.Replacefuseorresetbreaker.
2. Turn switch to ON.
3.Replacedoorpanelinproperpositionto
engage safety interlock or door switch.
4.Tightenconnections
NoHeat 1.SystemnotsettoHeat
2. Loose connection to thermostat or
system
3.HeatingSystemrequiresserviceor
thermostat requires replacement
1.SetthermostattoHeat.
2.Verifythermostatandsystemwiresare
securely attached.
3.Diagnostic:SetSystemtoHeatandraise
thesetpointaboveroomtemperature.
Withinveminutesthethermostatshould
makeasoftclicksoundand“HeatOn”
should appear on display.
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