Question about Thermador VTR1000Q Remote Ventilator Kitchen Hood

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Thermador Blower Motor Not Starting

My blower motor will not start. I can hear a buzz sound when I press the medium or high blower setting. If I manually turn the motor shaft by hand, the motor will start up. Feels like there is friction or drag on the shaft. Does this mean I need to replace the motor? If so, please provide a source. I'm surprised if it is the motor because it's only a couple years old and hasn't been used that much.

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  • Briann50 Jan 31, 2008

    Thanks, sounds like my problem. Model number is VTR1400Q and there is a capacitor on the top of the motor.

  • Briann50 Feb 01, 2008

    Yes I do.

  • Kevin Scott May 11, 2010

    Do you have a multi-meter that has ohms?

  • Kevin Scott May 11, 2010

    Model number pls. I need to see if this unit has a capacitor on the motor. If the capacitor goes bad the motor will not start itself. The motor would run if started by hand though. Waiting on your reply. Kevin

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  • 52 Answers

To check capacitor disconnect power to unit. remove wires coming from the capacitor making sure to note where they were connected. Using the ohms setting on your multimeter place one lead on each of the two post. Watch carefully and if the capacitor is good your meter will spike for a second then return to zero. IF nothing happens capacitor is bad. Good luck. Kevin

Posted on Feb 01, 2008

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1 Answer

Hood has a remote blower (VTR1400Q). Only working on MED and HIGH setting.


See if it has a blower motor resistor(controls speeds) and replace it.
Look up model at repairclinic.com & see it the resistor is a listed part. See link, go to repair help by model number. Forget it. I just checked the only part they sell is the motor for $267. You can buy a new hood for that.

May 16, 2016 | Thermador PH48ZS Kitchen Hood

1 Answer

I show voltage to the blower motor but it does not start when i press fan on the thermostat? Bad relays or bad blower motor?


Sounds like a bad motor. I don't know if your blower motor has an external starting capacitor and / or a running capacitor. If There is a starting capacitor and it's faulty , that would prevent the motor starting and turning.

Jun 01, 2014 | Honeywell R856B 1002 R856B1002 Fan Control

1 Answer

1998 buick regal blower motor and resistor making a click sound on high but will not turn on


You should always make sure that the parts you put back are compatible with the parts you take off. If i am not mistaken, there is another fan resistor outside under the hood, and one inside under the passenger side dash panel, if your motor is inside. One outside is for high, and the one inside is for low, medium, and medium high. If you know for a fact both speed control resistors are good, replace the switch on the dash panel. To check to see if the dash switch is not making good contact, take the switch while it is still in, and on low, high, or medium, push the switch lever to the right or left gentlely to see if it makes any contact. These year model cars are notoriuos of having fan motor issues early........

Jan 28, 2014 | Buick Cars & Trucks

1 Answer

Blower stays on after key is removed, now a/c works in front once I hit the highway.


Which of these systems does your vehicle have ?
HVAC Systems - Automatic
Blower Motor Control Processor
The blower motor control processor controls the speed of the blower motor by increasing or decreasing the voltage drop on the ground side of the blower motor. The HVAC control module provides a voltage signal to the blower motor control processor over the blower motor speed control circuit. As the requested blower speed increases, the HVAC control module increases the amount of time that the speed signal is modulated to ground. As the requested blower speed decreases, the HVAC control module decreases the amount of time that the signal is modulated to ground.

HVAC Systems - Manual
Air Speed - Front Control
The blower motor forces outside air into the vehicle's interior. The vehicle operator determines the blower motor's speed when the driver places the blower switch in one of 5 blower speeds. The blower motor will always operate in any switch position other than OFF, as long as the ignition switch is in the RUN position. The blower motor and mode switches are located within the HVAC control module. The blower motor OFF input is connected in series with the HVAC control module by the off blower motor control circuit.
Depending upon the selected speed, power is provided to the blower motor from either the ignition 3 voltage or battery positive voltage circuits from the fuse block. The battery positive voltage circuit only provides power when the High blower switch position is selected. Power and ground are provided to the HVAC control module by the ignition 3 voltage and the ground circuits.
Low Blower Speed
When the Low 1 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the low blower motor control circuit. Voltage is divided between 4 series resistors, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
Medium Blower Speeds
When the Medium 1 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the medium 1 blower motor control circuit. Voltage is divided between 3 series resistors, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
When the Medium 2 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the medium 2 blower motor control circuit. Voltage is divided between 2 series resistors, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
When the Medium 3 blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the medium 3 blower motor control circuit. Voltage is divided between a series resistor, a blower relay, and the blower motor to achieve the desired blower speed. The blower motor is grounded through the ground circuit.
High Blower Speed
When the High blower speed is selected, the HVAC control module applies voltage to the blower motor resistor assembly through the high blower motor control circuit. The voltage energizes the blower relay, causing the blower motor to be connected directly to the battery positive voltage circuit. The blower motor and blower motor relay are grounded through the ground circuit.

HVAC Control Module
The HVAC control module is a class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and distribution settings. The battery positive voltage circuit provides power that the control module uses for keep alive memory (KAM). If the battery positive voltage circuit loses power, all HVAC DTCs and settings will be erased from KAM. The body control module (BCM), which is the vehicle mode master, provides a device on signal. The control module supports the following features:

Feb 09, 2018 | 2005 Chevrolet Tahoe

1 Answer

The blower only works on high, the low and medium ...


The blower motor resistor is the problem. Remove the glove box door from the dash. The resistor is located to the left of the blower motor. Disconnect the plug from the resistor and the two mounting screws. Remove resistor and replace with neew resistor. Installation is the reverse of removal. Hope this will help.

May 20, 2010 | 2000 Dodge Caravan

2 Answers

Low does not work, medium and high do


You probably cant fix it, this sounds like a multispeed blower with hi/medium/lo settings. You
can either replace the motor or connect one of the
working speeds to low/med or low/hi. or bump med to low and high to medium.

Jan 12, 2010 | Desa International Blower Glow Warm Wall...

1 Answer

Blower motor stopped, there is a medium-loud ''electric buzz'' sound every minute or so as if trying to start the blower motor. Could be relay switch. Last week, I extracted the entire motor and fan...


you have a bad "starting capacitor" .. the capacitor is used to get the motor to start in the correct direction .. when its bad the motor doesnt know which way to turn so it just sits there buzzing until it gets hot .. that trips a thermal breaker in the motor and shuts it off ... when it cools it tries again .. dont let it do that for a long time since you could damage the moter eventually ... the starting cap is a round cyclinder probably mounted close to or on the motor (wires come from it to the motor) .. they are not expensive .. you can take the old one with you to a motor parts place so they can match it up with a new one ..

while the motor is buzzing .. if you spin the blower it will start in whatever direction you spin it ... it will run until its shut off but then wont start on its own again ... changing the starting cap will fix that ..

Aug 18, 2009 | Bryant Heating & Cooling

1 Answer

Blower motor resistor


Your blower motor is starting to fail, and needs replaced to fix this. I have this problem on one of my vehicles that is not used often, but in my case the fan will work on the medium setting and function without blowing the fuse, so to save money I hae not replaced mine yet. I yous does nt work on any setting you'll need a new one.

Jul 06, 2009 | 1998 Buick Century

1 Answer

Air Conditioner/Heater


Try setting the fan to medium, when you want less air blowing pull out on the ac button. Don't change fan setting.If your blower motor is starting to fail this will cause the motor to draw too much power blowing your fan fuse. If you want to get more life out of the motor do not set the fan switch above medium and it could last a lot longer. If you have the Extra money around $150.00 for the blower motor and at least that much again for the labor unless you DIY then you may choose to replace it I did this on My 91 Dodge B350 Xplorer Van Camper last august and it is still working.

Jun 18, 2009 | Sierra Online, Inc. You Don't Know Jack...

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