Install a Fireplace Blower in 7 Steps | DoItYourself Step 1Step 2Step 3Step 4Step 5Step 6Step 7With the fireplace completely cool, open the fireplace insert where you will be installing the fireplace blower. Usually this is a knock-out plate located at the bottom of the fireplace insertve the screws that hold the insert cover in place. It may be necessary to use a small amount of WD40 to loosen the screws. If this is the case, spray the screws and wait for the material to be absorbed before trying againe the screws aside where you can find them when needed to reattach the cov..See more on doityourselfAuthor: DIY Staff How to Wire Fireplace Inserts with Heat Sensors Electrical Wiring and Operation of Fireplace Insert Blower Fans: The temp sensor needs to have time to cool down in order to turn off the fan. Now, the fan blower will not go off when unit cools down. If I turn the variable-speed switch off and back on it will still the start fan motor.