Welcome
What Thermostat ?
Prof Ref Guide
Product Instructions
FAQs
HVAC Type
___Heat Pump Systems
___Zoned Systems
___Recreational Vehicles
Troubleshooting
Accuracy Note
Search
Glossary of Terms
Site Map
Contact
6004
6005
6008
6010
6020
6022
6025
6030
6035
6080

Back to List of FAQs

Q Why after installing a new thermostat, is the temperature fluctuating?

A If your heating system sounds like it is cycling on and off too often, first try increasing your SWING setting on your thermostat. If that does not help, the problem could be your heating systems stack switches or stack settings that control the fan.
To check this, change your thermostats fan switch from AUTO to ON. This leaves the fan always running. Now check your furnace to see if it is coming on and off. Another check is to remove the thermostat from the wall. With a piece of wire or an un-wound paper clip, connect the RH terminal to the W terminal on the back plate. This will turn on and hold on your heat as long as RH is connected to W. If it still short cycles, the problem is in the furnace.