The Honeywell RTH7600d thermostat works with both central heating and cooling systems. It costs about $80 at larger house and home stores like Lowe’s, Home Depot, and Amazon. At a decent price, this computerized model still clicks as it turns the climate control system ON and OFF. This is like the Robertshaw 9415 digital thermostat … Continue reading Honeywell RTH7600D Thermostat Review