Relay for the Blower Motor is BadAnother reason why your furnace fan may not be kicking on involves the relay on the circuit board. If the relay isn’t opening, the blower/fan can’t start. In this case, you can troubleshoot by testing the relay....
In using this design, the goal is to replace the controller currently being used, which is aWhite Rodgers 5D51-90 fan and limit controlinserted 8” into the heat chamber. The 5D51-90 fan and limit control is made up of two bimetallic switches, a limit swi...
To test the blower motor on its own, you will need a 12V power supply like an RV or car battery. Next, place the test leads to join the positive and negative wires of the blower motor to the positive and negative terminals of the battery. The fan should start immediately. Blower motor...
If Blower Motor comes on at R and G, Heating at R and W, and Cooling at R and Y, then the control board can likely be saved. This simple but thorough process is an important step in ensuring that your furnace is operating correctly. Step 6: Test Control Board Output Power Finally, ...
FIG. 2 is a wiring diagram for the heat pump conversion system of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENT The mechanical installation of a heat pump conversion system according to the present invention is shown in FIG. 1 and includes a furnace 10 having two sets of elect...
FIG. 2 is a schematic diagram of the control circuit of the present invention; FIG. 2A is a diagram of the compressor and outdoor fan circuits; FIG. 2B is a wiring diagram of the fan control circuit; and FIG. 2C is a wiring diagram for the furnace control circuit. ...
a. Basic inspection (cold test): the whole equipment is arranged reasonably, with good appearance, painting, no crack, no burr, color conforming to requirements, sealing inspection, inspection of purchased parts (motor, sensor, cylinder, electrical components, etc.), ...
a. Basic inspection (cold test): the whole equipment is arranged reasonably, with good appearance, painting, no crack, no burr, color conforming to requirements, sealing inspection, inspection of purchased parts (motor, sensor, cylinder, electrical...
In Figure 5 is shown a wiring diagram for the invention as installed in a heating system having the usual burner motor BM, room thermostat RT and limit control LC. H is the hot wire and G the ground wire. By limit control I mean any well-known automatic switch used to limit the tempe...
To do so, refer to the electric wiring diagram in section 7. To run the wire properly, refer to the drawings below. Wire running to the control PCB installed on the LEFT side of the furnace Wire running to the control PCB installed on the RIGHT side of the furnace WARNING: USE WIRING...