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Re: Noisy Heil Gas Wall Furnace..Fan or bearings??
No, The fan should be secured with a set screw at the hub and not slip on the motor shaft Depending on the motor rating, It should be difficult to stall the motor by hand. But, no, they are not variable speedin that manner. It should be one with the shaft. Good Luck, Ned
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Hiya! These fan units are a royal pain in the neck!
What you need to do, is get to the fan unit, remove the motor from the blade (they usually have a twist and lock bracket held on by a single screw)
The motors for the blowers are just simple shaded pole motors but these often dry out due to dust, and heat over time.
The best cure is to unscrew the motor and pull the shaft and rotor off of the front and back bearings... clean the shaft thoroughly of any debris and set aside.
Then, you want some light sewing machine oil (easily obtainable in most fabric stores) and you want to drip it around the outside of each bearing so the oil absorbs into the pads around the outside of each bearing. Add a smidge of oil to the inside of each bearing too, before reassembling the motor.
Make sure the motor screws are as tight as possible, and then with a screwdriver handle or similar instrument, give the motor shaft a few taps on one side, then a few on the other (this will align the bearings correctly.
Before reattaching the motor, on the other side of the fan unit you will see a little round metal or plastic cover held in place by a rubber gromit. This is the access to the spindle bearing. Pop this cover off and replace the grease under it, add a bit of machine oil too if you like (it cant hurt) and then replace the cover.
Check and make sure the set screw is tight. Sometimes the screw will loosen and cause the problem you are describing.
However, to get the blade off - take out the set screw - spray some WD-40 in the hole - getting as much on in the hole (and on the shaft) as possible. Work the blade on the motor shaft (use a crescent to turn the shaft within the hub of the blade) and it should slide off the shaft.
If the blade is rusted on the shaft - do the above - but let it sit (with WD-40 on it) for awhile, i.e. several hours or even overnight if possible.
Note: sometimes there is a little disassembly (of the unit) you have to do to work the blade out.
I would check fan motor for oil ports and add a few drops of machine oil if they are there. Check fan blades and clean as good as possible. If you can hold on to fan and move motor shaft back and forth more then 1/8 inch then the bearing on yhe motor are worn and you will need to replace the motor. Thank you.
You are in position to visualise the fault as the blades are turned so that the nosie is seen . It can be from rubbing of the fan leaf, slipping of the blades from the shaft, or a possible vibration.
remove the power and turn manually to hear the noise to correct.
This will take some work, and some elbow grease, but what happened is the motor bushings most likely seized. Try turning the blades with your hand. If they are stiff, the bushings are seized. What you will have to do is take the fan apart. First by removing the blades, then by taking the motor off of the frame. Then depending on the type of bolts/ screws that hold the motor together, remove them. Then split the motor apart by taking a flat blade screwdriver and sliping it between the two pieces of the motor and turning it so they slip apart. then once the motor is apart, shine up and clean the motor's shaft so it is clcan and shiny. then do the same for the bushing/ beringholes in the motor's casing. then drip some oil in the berings, and on the motor shaft, and put the motor back together. then put it back on the frame, and plug the fan in. turn it on. the shaft should just spin without any help. if this does spin, put the blades back on, and put the guard back on. Then you sucessfully rebuilt the motor and the fan!
The model no. does not seem correct.but it seems as if the hole in the fan blade which is normally D shaped has worn round.The thread on the shaft is Left handed and you will need to undo by turning clockwise. If you can get a vice grips at the back of the blade to hold the shaft then try again,or you will need to get into the back casing and try jamming the shaft at the motor housing you may need some help.Then if that works you will need to undo the 3 bolts holding the Motor body to the rear casing.The new fan would normally come with new bolts,blade and nut.To tighten fan blade nut use a 10mm socket hold the fan blade and tighten anticlockwise.Hope this is helpful.
have had the same problem! started with a noisy fan then a non responsive one. try taking out the fan assembly as per service and drop a couple of paslode lube drops along fan shaft and gently compress fan to lubricate bearing, may not be a lond term fix but hasnt stopped since and that was over 2000 2inch ago. good luck.
Hello janeknows. The shaft of the fan motor may have a bearing gone bad. Follow these steps to locate problem. #1-turn power off by tripping the breaker, place your fingers on the shaft surrorting the blades & SLOWLY rotate the blades feeling for a catch or bump. A bump felt I suggest replacing the motor. No bump #2- remove the screws holding the cover supporting the control switches. Located among the wiring is a box with 2 or three wires. This is a capacitor. Note the info on the capacitor (1.4mf125v). Contact the fans Mgfr they may send you one for free if not visit your local hardware store and ask. Replace the unit using the wire caps in the unit or snip & strip the wire using new wire caps. Note witch wire went where. Turn power on and test operation.