I have a Dacor Cooktop and the RV365 ventilation unit which rises up when engaged. The ventilation unit has risen, but will not go down. When I push the down button, the fan stops for about a minute, then comes back on. During the period when the fan is stopped, the unit makes no visible attempt to retract. Alternatively, I can hit the "stop" button and the fan will go off. Again, the unit does not retract. Fortunately however, the unit does not automatically come back on when the stop button is pushed. I have replaced the main control board. No change. What is the problem and how do I fix?
Replacement of the main control board.
Hello, and thank you for using this service. I'll be helping you with your problem today.if the unit isn't retracting then either your lift motor has failed or it's jammed. This is assuming that your new control board is good of course, but you'll want to check the left motor to see if you can unjam it if it's jammed. If you see nothing you can do to unjam the lift motor then you need to order and replace the motor itself.
I have already had the motor checked by a technician. He reported that it was ok. I will reopen the area and look. Perhaps he put something back incorrectly. I assume that it is the limit switch that we are discussing??
No, the limit switch isn't the problem. If the limit switch was bad then the vent would go down but come right back up or vice versa. Your problem is that the vent isn't moving at all which is a problem with the motor itself.
Is the motor behind the metal box behind the fan and hooked to the bar which raises the vent grill? This is what a repair man has already looked at and indicated it was working. What am I looking for to see if it is jammed?
yes, that is where the motor is located. Regardless of what the repair man looked at, he was already wrong with replacing the control board no? So why would you continue to listen to his advice. And the best way to look for a jam is with a multimeter. Test for 120 volts to the motor when it should be going down. If it's not moving and you can pull the lever behind the motor out of the way to unjam it, then you need to replace the motor.
now we are making real progress! To access the motor, I gather that I take the box off the wall and remove the screws which hold the motor in the box? Sorry to be so detailed, but I am reluctant to unscrew everything when I cannot see what I am unscrewing. the motor is totally hidden by a metal box that it appears to be screwed to and that box is then attached to the wall.
I honestly couldn't say without being there exactly what needs to be done to remove the motor because it's not an easy task, but it does requires that the entire front face of the downdraft needs to be removed as well as the metal box and other brackets behind them