Honeywell L4064B2236 Fan/Limit Control Heater - Page 3 - Answered Questions & Fixed issues


it very well sounds like your fan switch , does your fan work at all, like in ac mode on by turning the fan on/auto switch on the thermostat to ON. If the fan does come on its the more and likely the limit switch. if it doesnt come on it could be the motor or the run capacitor. the limit switch has a dial on it that as it heats up it spins clicking on at a desired set temp ussually about 120 to 150 degrees F. turning on the fan if the fan doen't come in the the next setting clicks off the gas valve turning off the burners ussually set at about 220 degrees F. now if the fan is working when the heater is satisfied there is a setting at about 90 deegrees F. that shuts the fan off hope this helps

Honeywell... | Answered on Jan 05, 2009 | 1,015 views


The fan limit switch is basically like a thermostat. When the plenum heats up to a certain degree it turns on the fan to start heating your house, and turns off when the fan off when the plenum gets around 80-90 degrees so that you’re not pumping cold air in to house. It also acts as a safety switch if the fan does not come on the plenum will get way to hot so this fan limit will kick the furnace off before that happens. As far as that little white button it should always be on auto you can try to use needle nose pliers to get it back into the auto position, or if you have the broken piece you can try to glue it back on. The white button goes in and out it does not turn or anything just make sure you turn the power off first and if u can’t fix it replace.

Honeywell... | Answered on Nov 17, 2008 | 507 views


There could be some problem related to battery replacement.

Honeywell... | Answered 2 days ago | 11 views



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Honeywell... | Answered on Nov 19, 2020 | 15 views


It means the thermostat is set for cooling vs. heating

Honeywell... | Answered on Oct 30, 2020 | 53 views


Actually the message is Bat Low meaning the internal batteries need to be replaced.

Honeywell... | Answered on Oct 30, 2020 | 68 views


1. Incorrect battery installation
2. Defective batteries
3. Thermostat failure

Honeywell... | Answered on Oct 30, 2020 | 46 views


Request the manual directly from Honeywell.

Honeywell... | Answered on Oct 30, 2020 | 41 views


Request the diagram directly from Honeywell.

Honeywell... | Answered on Oct 30, 2020 | 73 views


Contact Honeywell directly to request the manual.

Honeywell... | Answered on Oct 30, 2020 | 34 views


don't know but honeywell technical support may know
https://www.honeywellstore.com/customer-service/contact-us.htm
check if it has a safety switch in the base as it may not be making contact with the surface the fan is sitting on.
It has a timer maybe cause ?
if not in usa then go to honeywell in your country and then look for help at bottom of web site.

Honeywell... | Answered on Jun 01, 2020 | 45 views


Off position then reverse batteries polarities and wait 5 sec. Then place new batteries back to normal position.

Honeywell... | Answered on May 23, 2020 | 2,507 views


https://www.youtube.com/watch?v=RtgN-tM9Al0

Honeywell... | Answered on May 03, 2020 | 54 views


Robert Shaw 9500 manual

Honeywell... | Answered on Apr 29, 2020 | 174 views

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