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Honeywell L4064B2236 Fan/Limit Control Heater Questions & Answers
How do you adjust settings
take cover off and hold round dial so it dosent move. there are 2 tabs in the dial . the one on the left is the low limit. the one on the right is the high limit.high limit is when the furnace shuts down 200. the low limit is when the blower will stop 90 to 100 degrees.
12/12/2012 1:00:57 AM •
Honeywell...
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Answered
on Dec 12, 2012
Blower tries to turn on,
sounds like a run capicitor is going bad. when looking at the blower do you see like a small metal canister with wires on top.
3/12/2011 1:33:59 AM •
Honeywell...
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Answered
on Mar 12, 2011
Blower motor will not come
if you have this fan switch as showen in your post you should be able to pull the on/off switch, white button, to turn it on and off to test. if it doesn't work you have no power or it is wired wrong
2/15/2011 3:45:36 AM •
Honeywell...
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Answered
on Feb 15, 2011
I have 2 hvac units running an electric heating
Hi, these Honeywell combination fan/limit controls are used for turning the fan on after the combustion changer reaches the factory setting on the round dial that you see when you remove the cover. The high limit will turn the fan on when it reaches this temperature, and off when the stat is satisfied. If the blower motor fails due to a burn out or short, it shuts the main burners down on the high limit setting. These controls can be removed and you can clean the probe which has a set of contacts at the end. Sometimes this will fix the problem. Check the settings on the dial to see if they are set right to come on, the time it takes between cycles, and the temperature they are set to shut off. This sounds as though you need to check your thermostats also. They could be a problem. You say electric heat, but then you are saying flames? If these limits have the manual fan button, make sure they are on auto. Long delays could also mean you have a dirty flame sensor located by the pilot. You can clean the metal tip with steel wool or fine sanding cloth. Short heating cycles may be your thermostats like I said before. You shouldn't have to replace the fan/limits as I told you what they control. These will cause a fan to run and not shut off after the stat is done, so check to see if they are dirty. Please keep me posted.
Shastalaker7
A/C, & Heating Contractor
2/12/2011 2:30:41 AM •
Honeywell...
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Answered
on Feb 12, 2011
What is a good seting
I just did a search-- Here is an excellent, illustrated article on the purpose and settings of this important Fan controls switch- Enjoy!
http://www.inspectapedia.com/heat/FanLimitSwitch.htm
Let me know if you have other questions on the adjustment
Thanks for asking-
Mack B
1/26/2011 2:48:15 AM •
Honeywell...
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Answered
on Jan 26, 2011
Hi!
my DAY&NIGHT furnace the fan
LOOKING AT THE PIC ON THIS POST IF YOU HAVE THE WHITE BUTTON PULL IT OUT. IF FAN COMES ON THEN IT IS THE SWITCH. IF FAN DOESN'T COME ON THEN YOUR FAN MOTOR IS BAD
1/5/2011 3:07:45 PM •
Honeywell...
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Answered
on Jan 05, 2011
Need wiring diagram for honeywell
http://www.inspectapedia.com/heat/Fan_Limit_Switch_Installation.htm#Wiring Go here, it is a super site for just about everything home related.
12/30/2010 5:16:52 PM •
Honeywell...
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Answered
on Dec 30, 2010
The blower would not shut
The dial positioning does not really matter as this is a thermometer of sorts. It is a thermo controlled switch, upon reaching the desired temperature it turns on the blower and upon cool down it shuts off the blower. The dial positioning is not necessarily critical but with him turning it he could have damaged it meaning that instead of registering at say a set 150 degrees it may actually be more than 150 or less than 150 and it will work just the set temperature may be wrong. Confusing isn't it!!
12/27/2010 2:36:44 PM •
Honeywell...
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Answered
on Dec 27, 2010
We have a newmac wood furnace with a honey well
if it is the fan that wont cut off, make sure the manual over ride button,(white push/pull) is in the auto position.if the burner will not cut off then the spring on the control is failing and the control should be replaced.control can be found online or at most heating supply companies.
12/20/2010 11:00:58 PM •
Honeywell...
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Answered
on Dec 20, 2010
I have a 2006 model
try checking the gas pressure might be to high or low thats what i would check first
12/11/2010 2:05:14 AM •
Honeywell...
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Answered
on Dec 11, 2010
What are the correct setting
The correct setting is whatever setting you want. Set the fan on at some temperature, set the fan off temperature at about 20 degrees below the on setting. If it still runs a short time, either increase the on time or decrease the off time. If the off temperature is comfortable to you then I would suggest increasing the on temp. Do the changes in small steps. Good luck and keep that oil burner tuned...
11/27/2010 12:48:30 AM •
Honeywell...
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Answered
on Nov 27, 2010
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