It works off of temperature and also provides a high-temperature safety limit.This is a switch, actually two switches, which turns the furnace blower on and off based on the temperature of the heat exchanger. Honeywell L4064B2210 Fan and Limit Switch, 11-1/2" Insertion, for Forced Air Heating Systems. Troubleshooting the Fan Limit Control Switch on a Furnace, … A helical bi-metal probe extends from the back of the fan limit control. There are other Camstats so the list is not inclusive of all the fan limit switches they offer. Amazon.com: Honeywell L4064B2210 Fan and Limit Controller: … The photo at the top of this pag eincludes arrows pointing to the controls and wiring terminals in a Honeywell combination fan and limit control type L4064B. Here is a list of basic steps to follow and things to look for when troubleshooting a fan limit switch control. Insert-L4064B2228 - … honeywell fan limit switch wiring diagram – Architectural circuitry representations reveal the approximate areas and affiliations of receptacles, lights, as well as long-term electric solutions in a building. Then you can try 04DW. This makes better use of the heat produced by the furnace. These ceiling fans and a host of others are readily available for purchase online at the Honeywell Store. In many models it also has a built-in safety control for the burner to shut off at higher temperatures if the burner's inner control malfunctions. Turns fan on and off according to plenum temperature via helical bimetal sensing element. Lastly, they offer a high limit setting (adjustable) so if the heat exchanger is getting too hot it shuts the main burners down for safety. There could also be other types of switches in the circuit such as a pressure switch or centrifugal switch for a forced or induced draft motor. $63.58 $ 63. Your email address will not be published. There are differences in these furnace control switches so if you replace the one in your furnace be sure to replace with an exact replacement and make sure you get the settings correct from the old fan limit switch control to the new fan limit switch control. Universal Combination Fan and Limit Controllers. Additionally, make sure not to cross the line voltage with the control voltage as some use both line voltage and control voltage wired to the fan limit switch. 2. Additionally your service technician will appreciate you not planting holly bushes near the outside unit, Lastly have system serviced every six months - once for heating and once for cooling before the season starts. The above-referenced fan limit switches offer features such as “Heat Assist” where the switch delays the blower turning on to allow the heat exchanger to heat up. Breakaway Jumper included. We do get a small commission from any sales for our affiliates for which we link. Honeywell Fan Limit Switch Wiring Diagram | Fuse Box And Wiring … That safety circuits typically have more than one safety in the circuit and they are normally wired in series. Another limit control switch which is integral to the Honeywell fan control is a high-temperature control limit switch. To trace out the safety circuit you need to be able to read the furnace wiring diagram and follow the circuit out checking each switch. Before you get started, check the air filters in the system. Proper wiring of the control is important for safety reasons. The switch is one of the easier devices and attachments on a furnace. Additionally, I recommend taking a photo of the old fan limit switch and how it is wired before you start ripping the old wiring out and removing the fan limit switch. The fan limit control switch on a furnace regulates when the blower will come on or shut off. I hope you enjoy and find them very beneficial! These cookies will be stored in your browser only with your consent. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. If you make a mistake it could cost you a lot more than calling in a professional especially for control and wiring issues. When the furnace heat exchanger heats up the bimetal twists causing the round dial (shown in the picture) to turn. Also believe the products we link to help our site visitors find products they need to enhance repair... The device provides them to running these cookies will be stored in your browser only with consent. Right otherwise the fan is to stop to prevent damage to the Honeywell Store is specifically calibrated from back! Should be taken to properly wire the control voltage with a voltmeter device provides them time... Should not exceed the setting for high limit should not exceed the rated amps for furnace. 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