
- Check the anticipator, which is a small metal tab on the front of the printed scale. Give it a light push in either direction. It may be stuck.
- Clean the interior of the thermostat housing and clean the contacts (small metal plates)
- Check loose wires or wires that may be corroded.
- Read the thermostat manual (if not available, look online) for other tips such as ensuring there is voltage to the terminals.