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Re: Aprilaire 700 leaks water from bottom of case
Install new water panels yearly. On the new panel make sure that the painted dot on the edge of the panel is on the top when you install it.
Always clean the distribution tray and the frame. Make sure the notch on the edge of the distribution tray faces away from the furnace. Make sure the humidifier was installed level. Keep the drain tube opening clear. Insure there is no blockages in the drain tube.
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Most likely you have too much water going to the unit you may have to throttle down the water valve that is tapped into the domestic water source. Also check to see if the tray is in the spud going to the drain
you can bypass the humidistat by shorting the 2 brown wires on the bottom of the humidifier. just remove the 2 wire nuts and touch the 2 together (just 24v)if it comes on then there is a control problem with the humidistat or wiring if it doesnt come on the control board or transformer may be bad or you dont have 120v to the humidifier on the plug. also make sure your furnace blower is running cause the hum cant come on if its wired properly unless the fan is running. you also may want to go to www.aprilaire.com and get a maintenace kit from their online store. it comes with pad and new hose along with a couple other things.
The tune up kit that I ordered arrived on Friday and I installed most of it on Friday night. While it is nice to have a new frame and the distribution panel and I think the price of the whole kit was fair considering it comes with the parts and 2 water panels, the fix was really simple.
The kit came with the water distribution tube with with a new blue orifice (Aprilaire #4232) already inserted. This orifice is in the end of the plastic tube at the solenoid end. When I removed the old water distribution tube, the old orifice was not really dark blue anymore but kind of a light blue and was deteriorating from 12 years of exposure to the chemicals in the water. What should have been a pin-hole size opening in the orifice was up to about 2mm or a little more so the orifice was letting way too much water through.
If anyone else has this leaking problem, and your orifice is several years old, I would check that first. It is a $2.75 part and may be the cause of the leak. The whole feed tube kit is only $8.75 and includes the feed tube, nozzle, orifice, ferule, compression nut, strainer so if you need to replace the orifice, I would order the whole feed tube kit for a little bit more.
if the water panel needs to be replaced , this can happen. instead of going through the panel , water will run on the outside of the panel and drip through the seems on the humidifier cover. make sure the plastic hose that goes into the water panel is inserted into the water panel.