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My dryer stopped, it indicates sail switch open fault. how do i fix the problem?


The sail switch is an air flow detection device inside the dryer. This is a problem a qualified electronics technician will need to address.

Mar 02, 2014 | Dryers

1 Answer

I have an Aprilaire 700. Whenever the unit has been turned on, the water flow to the unit will not stop running. What part(s) do I need to replace so that the unit will properly turn the flow on and...


Hello, in order for the humidifier to turn on and off with the furnace you need either a sail switch or current sensing relay. A sail switch mounts in the return air duct and senses the return air when the furnace turns on thus turning on the humidifier and turning it off when the airflow stops. A current sensing relay works the same way but instaed of sensing airflow in senses current on the blower motors common lead and is easier to install than a sail switch. I will post a pic of both

robhvac47_24.jpgSail switch



robhvac47_25.jpg Current sensing relay

Feb 27, 2011 | Aprilaire Air Purifiers

1 Answer

The water runs constantly, not just when the furnace turns on.


Do you have a sail switch or current sensing relay with this humidifier? In order for the humidifer to turn on and off u need either a sail switch that senses airfllow in the return air duct and will turn off the humidifier when the blower motor stop or a current sensing relay that senses current on the blower motors common wire. I will post of pic of each one

Sail switch robhvac47_3.jpg


Current sensing relay robhvac47_4.jpg

Jan 03, 2011 | Aprilaire 700 Humidifier

1 Answer

Wired a new 360 through Hum blew 3amp fuse. How to wire so it doesn't blow fuse. Have open EAC and EAC2.


Review figures 5, 6 and 7 on the installation instructions and compare with how you wired your installation.
The red wires are not used if you use a mechanical humidistat, (are used with electronic humidstat - supplies 24 volts and go to "hot", "commod" on humidstat). Yellow wired to "Hum" whether electronic or mechanical humidistat used.
If using sail switch or current sensing relay, cuts into one of the yellow wires. - One yellow goes directly to humidisat, then comes out of other side of humidistat & runs to to relay (or sail switch), and comes out of relay (or sail switch) and runs back to humidifier.

Dec 17, 2010 | Honeywell HE360A1027 Whole House...

2 Answers

Error code F64 on lower thermador oven. Works for a minute or so then beeps and F64 is showing,


Hi, i found out from Thermador customer service that error code F64 means that the lower fan switch (located inside the bottom trim on the right side) is not being detected as closed. In my case, this was because the header (P4) on the Display panel had broken loose from the PC board and was no longer making contact. P4 is where the lower fan switch wires connect to the control boards (actually the display panel).

Nov 12, 2010 | Thermador Ovens

1 Answer

Whats a sail switch


A sail switch is a Blower "on" proof switch. It's purpose is to prevent equipment such as air cleaners and/or humidifiers from energizing unless the blower is running. The sail switch literally has a sail that is put in the ductwork. When the blower starts, the airflow will push the sail so as to close a switch allowing accessory equipment to operate.

I hope you find this information to be very helpful to your moving forward. Let me know if you have any further questions, comments, or concerns.

Please leave a rating. :-)

May 11, 2010 | Aprilaire 550 Humidifier

4 Answers

Error code "43"?????


Thanks Marty for the info on the sail switch. We experience the same error code 43 problem. Seemed like the sail switch was stuck in the back position and didn't come forward when the fan started. So I bent a metal coat hanger and used it to pull the switch foward to "unstick" it. I tested the oven turning it on and off a few times and made sure that the switch moves forward with the blower fan starting when the oven was on, and moved back when the oven was turned off. Should be obvious, but make sure the blower is not running and the oven is turned off before you stick the wire hanger back there. A pretty quick and easy thing to try before calling the repairman.


12_31_2011_10_00_20_pm.jpg


12_31_2011_10_06_54_pm.jpg





12_31_2011_10_07_56_pm.jpg

Aug 02, 2009 | Thermador PG304BS Gas Kitchen Range

1 Answer

1989 ford ltd check engine light on obd 1 code 23 and 67


Start with replacing the TPS. The two aren't related.

May 20, 2009 | 1989 Ford LTD

2 Answers

Help solve my dryer will not dry my clothes what can i do?


LONG dry time is an indication of a clogged or restricted exhaust. Clogged or restricted exhaust is the primary cause of failure in all residential dryers. Blowing the the system with a shop vac is only a temporary solution. The system needs to be cleaned (2 to 3 times per year) with a rotary brush to scrape lint collecting from the sides of the pipe. Suggest going to Lowes and purchasing vent cleaning kit. Read instructions CAREFULLY. Also consider replacing flexible plastic or foil pipe with rigid metal type. Dryer will vent 30% to 40% better. If condition persists for too long, a high limit fuse mounted on the heater will open causing the heater to no longer operate.

May 03, 2008 | Maytag Neptune MDG5500AW Gas Dryer

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