20 Most Recent Honeywell L4064B2236 Fan/Limit Control Heater - Page 2 Questions & Answers

First thing I would suggest just to be on the safe side before you began shut power off to unit.
Remove cover on combination fan and limit.
I would set the fan on at 130-140 and fan off at 90-100 degrees. When you adjust setting grasp the outside of the dial to stop it from rotating when you are moving set point indicators. Replace cover and turn power back on. I hope this helps you. Thanks.

Honeywell... | Answered on Nov 24, 2010

yes you can remove it and clean the back undo 2 screws and it will slide out

Honeywell... | Answered on Nov 21, 2010

If the jumper has been removed, then the control is working in the low voltage circuit. Black should be 120v in, White the 120 going out to the fan, and the red or limit wire is (should be) in the low voltage control circuit. Have you looked at the wiring diagram for the F and L Control? If not I will provide a link for you. https://customer.honeywell.com/techlit/pdf/69-0000s/69-0117.pdf

Hope this helps

Honeywell... | Answered on Nov 17, 2010

For most applications I would set fan on at 140 Degrees, fan off at 90 degrees and fan limit should be either factory at 190-210 or I would set it at 190. When you are setting set points on dial you should hold outside of dial so it can't move and set inner indicators where you desire. If you want you can vary by a few degrees but I would not go below 90 on fan off or above 140 on fan on. Possibly 100 and 120. Hope this helps you. Thanks

Honeywell... | Answered on Nov 14, 2010

on your fan motor. red is low speed ,blue is med speed, black is high, red for heating . blue works good for cooling. black is high speed. re look where the forth speed was hooked up. put blue there.

Honeywell... | Answered on Apr 16, 2010

you could try national energy they very help full if you give then make and model they should have one to fit

Honeywell... | Answered on Apr 05, 2010

Did you just install this or has it been running for a while.
Usually if the fan keeps running and if you just installed it,the temperature settings need to be adjusted, but first make sure the fan switch button (should be the white button) is pulled out completely.
Set your Fan on setting at about 120°F and fan off at about 90°F.
If you get your fan settings to close together when the blower starts it may cycle on and off a few times before finally staying on.
If this has been in service for a while then it's probably bad and needs replaced.
To check it out first make sure the fan switch button is pulled completely out then turn the fan on setting up and see if it will shut off,if it doesn't then it's bad and needs replaced.

Honeywell... | Answered on Jan 11, 2010

Chances are you ahve a bad fan limit switch. If it is adjustable try to adjust. Set at 90 and 120. If it is off a little move the temp up a little. Should have slide dial under the lid on the fan limit. Keep in touch Rus

Honeywell... | Answered on Nov 25, 2009

You should have a fan relay on your furnace that would control your fan in air conditioning and that sounds like you are needing

Honeywell... | Answered on Nov 12, 2009

Hmm this is tricky it depends what kind of furnace you have etc....need more info but basically you supply 120V to the common connection(with the jumper) and from there you would run a wire L1 to the furnace motor from "Load" on the fan side....and the wire L1 from the "Limit" side will power the furnace transformer../..the Limit ios very important and must be wired correctly...I suggest you have an exspert install it

Honeywell... | Answered on Nov 01, 2009

The motor bearings are worn and/or the motor windings are bad. Check to see if the motor has any tubes or caps at the bearings to add oil. You may need to remove the motor and dis-assemble it to oil the bearings. If it has sealed bearings you will not be able to oil them and will need a shop to re-build the motor or buy a new one. The buzz is from the motor binding and will overheat the motor & possibly damage it if it has not already. You could try using 3 in 1 oil and apply it to the motor shaft. It may pull some of the oil into the bearings and help a little. But if the windings are worn out the motor will need to be re-built or replaced. Also make sure that the belt is not too tight...this can cause bearing failure in a motor. Let me know if you have any questions.

Honeywell... | Answered on Sep 29, 2009

seems like there is a problem with the motor, it will need replacing for it to correctly work.

Honeywell... | Answered on Jun 26, 2009

could be a relay possible fan motor try put the fan to on on the thermostat if no fan one of the two relay or fan motor. you'll need a volt meter and know how to use it to solve problem It would be safer to call a contractor. Tom

Honeywell... | Answered on Jun 19, 2009

remove the switch and test it with a meter on ohms or remove the switch and disconnect the fan wires and connect the fan wires to an extention cord to test.

Honeywell... | Answered on Jun 09, 2009

first try to pull the little white button out, it is a manual control button, and the out position is auto. If that does not work try taking off the cover, lightly hold the dial down while you adjust the settings. they are on the side of the dial, first setting is the off pos. set to 90, second is the on pos. set to 125-135. then put cover back on, while being careful not to push the button in.

Honeywell... | Answered on Apr 26, 2009

first try to pull out the little white button on bottom left side. if it is already pulled out, then take cover off, lightly press on the center dial as you adjust the little adjusters that are in the dial. should be two of them, the first should say off set to 90, second one says on set to 130or 135. these steps may work. if not then one of the wire connections may be loose.

Honeywell... | Answered on Apr 26, 2009

I sounds like the thermostat you have is heating only. You need to buy and install a heating/cooling thermostat. The new thermostat will have a sheet with wiring diagrams to choose from.

Honeywell... | Answered on Apr 23, 2009

what is happening is that the heat exchanger has to get to a certain temperature before the fan comes on that way you have warm air blowing out of the grilles and when the heat excahnger gets cool it shuts off until it warms back up again.

Honeywell... | Answered on Mar 11, 2009

try to dial rotate in middle,not left not right.

Honeywell... | Answered on Feb 17, 2009

I would start by sanding the flame sensor. It will be located in the path of the flame.

Honeywell... | Answered on Feb 17, 2009

Not finding what you are looking for?
Honeywell L4064B2236 Fan/Limit Control Heater Logo

62 questions posted

Ask a Question

Usually answered in minutes!

Top Honeywell Heating & Cooling Experts

Bill Long

Level 3 Expert

606 Answers

Paul Carew

Level 3 Expert

3484 Answers

Cindy Wells

Level 3 Expert

6068 Answers

Are you a Honeywell Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Honeywell Heating & Cooling

  • Honeywell Heating & Cooling

Most Popular Question

bad fan limit control honeywell l4064a

  • Heating & Cooling