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Mitsubishi MSZ-FD09NA Furnace Door Switch
The furnace door switch blocks the draft inducer and gas ignition being triggered to start so as to stop a potential explosion. Do not try to fix it, just have it substituted for a new part as quick as you can especially if you think it is defective.
Simple indications of an inadequate safety furnace door switch
- The whole system will not operate even with the door closed
- The switch appears to be broken completely
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If you are going to be buying or ordering a replacement furnace door switch for your Mitsubishi MSZ-FD09NA, do your due diligence and cross-check the correct model as well as make a visual inspection in order to be sure the correct replacement furnace door switch is being ordered. HVAC professionals may charge higher prices than others so you may want to keep a lookout locally to find a good deal if you do not want to pay too much.
Feel free to download your manual for help.
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