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Honeywell L4064B2236 Fan/Limit Control Heater

I saw you helped someone with a problem with this unit. Here's my sitch; My furnace was blowing only cold air the other morning. I still had a pilot light. I used multimeter found that valve was getting proper voltage. So I bought new $175 valve. Store said I couldn't return it if used. Since I wasn't sure. I hooked up new valve just to test it, without sealant, ect. It worked! Had fire and fan. I shut every thing off, pulled valve and put in properly. Now, my fan won't kick on. I tested all leads. I have power into Honeywell limit, but nothing coming out. Is this my problem, and what can I do to fix it? Any help would be appreciate. Thanx.

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Re check all the wiring.

Posted on Jan 05, 2009

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1 Answer

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.

Dec 02, 2012 | Honeywell L4064B2236 Fan/Limit Control...

1 Answer

How does a honeywell L4064b2236 work? It is set up on a Gas hot air furnace with the jumper removed, Three wire connection, black to common white to fan and red to limit. The furnace has a tranformer on...


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

Nov 16, 2010 | Honeywell L4064B2236 Fan/Limit Control...

1 Answer

How to wire it


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
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Nov 01, 2009 | Honeywell L4064B2236 Fan/Limit Control...

2 Answers

Blower will not turn on when a/c compressor comes on - tstat ok fuses ok


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

May 24, 2009 | Honeywell L4064B2236 Fan/Limit Control...

1 Answer

Heater doesn't heat


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

Feb 16, 2009 | Honeywell L4064B2236 Fan/Limit Control...

1 Answer

Pilot light will not light


Sounds like you may need a new electronic control module. This is a rectangular shaped plastic box that has wires coming out of it. This is what tells the pilot to light on these older furnaces.

Jan 25, 2009 | Honeywell L4064B2236 Fan/Limit Control...

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