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It sounds to me like you need new bearing on your blower. Also before I did that I would check to make sure that a set screw didn't come loose allowing squirrel cage to slip to one side and rub. Hope this helps. Thank you
The best way to really clean the squirrel cage is to remove the entire indoor blower motor housing assembly out of the furnace then remove the squirrel cage from the motor shaft and pressure wash the squirrel cage. Make sure you don't use to much water pressure as you might knock off any balancing weights that may be attached to the one or more of the vanes. Make sure the cage is completely dry before you re-install it back on the motor shaft.
Absolutely should be positively "locked" to the motor shaft. There should be a set screw in the collar of the squirrel cage mount. Either it is missing of has loosened. Please tighten (or replace) this set screw. Also, it is very IMPORTANT to make sure that if there is a flat machined surface on the motor shaft, that you align the squirrel cage (and set screw) so that the set screw will seat firmly and squarely against this flat surface. This design ensures that once properly aligned and set, that the squirrel cage will follow the motor shaft faithfully. Also, it is recommmended to apply some thread sealant (Locktite) to the threads of the set screw so this will not happen in the future. Vibration can be the cause of this.
I think your talking about the heater fan? If you hear more noise as you increase the blower speed, there is something in the squirl cage or a problem with the blower motor itself. Leaves, paper or something lite on the pass side floor, it will get sucked into the recirculation duct,causing a noise.Remove the blower motor and clean out any debris, and inspect the squirl cage and turn the motor by hand to see if you hear any noise
okay, you need to check your ventillation, make sure it is not clogged, if not then change your coils, there are 2 black coils at the burner, one has 2 terminals and the other one has 3.
I don't know exactly what you mean by getting water on the dry side of the compartment. In any event, as you will see, there are very few sites that are dedicated to the maintenance and repair of evaporative coolers--you, in fact, submitted this problem of yours under the Air Conditioner section because there is no Evaporative Cooler section.
Having said this, I offer you two things: 1) a site that has a section dedicated to evaporative coolers, which took me a long time to find for my own problems:
It's possible that the blower fan is bad, which would also account for the noise. It's usually just a plastic squirl cage mounted on the end of the drum motor shaft. It can crack and break off of the shaft and just be rattling around on the shaft, moving very little air. They're usually cheap and easy to replace.
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