Venstar EXPLORER, Quick Start Setup Manual

18

Troubleshooting

Use the following troubleshooting guide to diagnose common 
problems. If you are still having problems or are unsure please 
visit 

www.venstar.com/thermostats

 or e-mail customer service at 

thermostatsupport@venstar.com

Problem

The air conditioning does 

not attempt to turn on. 

The display is blank.

The heating does not 

attempt to turn on.

When using a residential 

heat pump the heat comes 

on instead of the air 

conditioning.

When calling for air 

conditioning both the heat 

and cool come on.

Possible Cause

The compressor timer 

lockout may prevent the air 

conditioner from turning on 

for a period of time. 

The cooling setpoint is set 

too high.

You may have selected Free 

Cooling in settings.

Lack of proper power.

The heating setpoint is set 

too low.

The thermostat reversing 

valve dip switch is set 

incorrectly.

The thermostat equipment 
dip switch is configured for 

“HP” and the HVAC unit is a 

gas/electric.

Solution

Adjust the  

Compressor Min.  

Off Time to “None”. 

Lower the cooling setpoint 

or lower the cooling 

setpoint limit.

If you don’t have a damper, 

and special duct work 

installed, turn off this 

feature in settings.

Make sure the power  

is on to the furnace  

and that you have a 24 vac 

between R&C.

Raise the  

heating setpoint or raise  

the heating setpoint limit.

Set the reversing valve  

dip switch to the  

opposite position.

Set the equipment  

dip switch for “gas”.