Problems With Honeywell RRD Dampers

Zoning Features

• HVAC zoning systems use individual thermostats for each room. These thermostats are hard-wired to a main computerized panel. A user sets a thermostat for a particular room. The main panel responds by sending heated or cooled air through the home's ductwork. Each room has a damper that automatically opens and closes for heating or cooling. A room that does not require heating or cooling will keep its individual damper sealed for preventing any air loss within the HVAC system.

Wiring

• Problems with the Honeywell RRD damper can reside in the wiring. Incorrect wiring can cause the damper to operate backwards, such as opening when the thermostat is not set for any heat or cooling. Follow the wiring installation instructions from Honeywell since each installation varies, depending upon the number of thermostats and dampers. Verify that the wiring type is the correct size, either 18 or 20 gauge. A smaller wire gauge value may not allow the electrical current to flow across the wiring, preventing the damper's motor from operating.

Duct Obstructions

• The Honeywell RRD damper fits in a standard round duct. However, duct damage or warping may alter the round shape. As a result, the damper's blade movement may be impeded, causing the blade to stick and stop operating. Confirm that the duct is round, as well as removing any obstructions near the damper's blade. The damper's blade should move freely when moved manually.

Circuit Breaker

• Overall, the main panel controls the damper and thermostats. Verify that the main panel is receiving electricity by checking the system's circuit breaker if the damper, or set of dampers, is not responding. A tripped circuit breaker for the HVAC system will shut down the entire system.

Motor Malfunction

• The damper's motor may fail due to age or electrical malfunction. As a result, the damper will fail to open or close regardless of the thermostat setting. Confirm that the motor has failed by verifying the correct wiring configuration. Contact a HVAC technician for a replacement motor or possible repair.