Question about Honeywell L4064B2236 Fan/Limit Control Heater

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Tring to wire a thermostate to a hyeil fan relay timer hq1005229wa to a wood stove limit switch that has two blowers

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6ya6ya
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Posted on Jan 02, 2017

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aquaman987
  • 927 Answers

SOURCE: blower fan running constant after new fan and

Here's my best shot.
Check the temperature settings for the fan switch.
The low OFF setting should be about 100 degrees.
The ON setting should be around 150 degrees and this is the setting that "makes" the ON contacts.
The HIGH LIMIT setting should be about 180 degrees.
If these are set, can you use a meter to see if the FAN ON contacts are closed?
Lastly, it appears that one hot line should go to one side of the blower and the other hot line should go to the bottom FAN terminal with the other side of the blower being fed by wiring from the top FAN terminal.
Good Luck. Gary

Posted on Feb 22, 2011

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walterkunesk
  • 683 Answers

SOURCE: Please tell me where the black wire from the

http://www.transtaracsupply.com/pdf/l4064.pdf see if this helps you. wally

Posted on Oct 07, 2011

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1 Answer

Can i hook up a thermostat to my hot blast wood/coal stove to control the heat in my home


Yes, you most certainly can. It depends on how handy you are and to what extent you are willing to go to make this happen. A lot will depend on how comfortable you are with electrical wiring and understanding HVAC controls and their function.

First though, this is the typical way a wood fired forced air furnace is designed to operate. There is a control transformer and relay to control either a combustion air fan (that you do not have) OR a motorized damper for combustion air that you also do not have. The relay closes on a call for heat from the thermostat and opens the damper from its minimum position to allow combustion air into the firebox. As long as there is solid fuels (wood) in the heat chamber, the fresh supply of combustion air will allow the fire to burn or begin to burn very quickly.

As the temperature in the wood furnace plenum increases, the automatic fan control will start the fan and it will run as long as the bonnet temperature is higher than the fan'on' setpoint on the fan control... Now the house warms up and the thermostat satisfies which allows the combustion air damper to spring back to the minimum position, causing the hot fire to die down due to lack of combustion air.

The now smoldering fire will not generate enough heat to keep the fan running too long, so the automatic fan control shuts the fan off until the house cools approximately 2 degrees below thermostat setpoint. The thermostat calls for heat and opens the damper and on goes the cycle....

An important item to remember is that on the automatic fan control, there is a 'limit switch' function. The motorized combustion air damper or the combustion air fan must be wired through the limit switch in case the bonnet temperature exceeds 200 degrees F. This function will then allow the damper to go to the minimum position or the combustion air fan to go off, causing the fire to cool down due to lack of adequate combustion air.

You don't want the thermostat controlling the circulating fan directly, because of two things: 1). If the fire is out, there is no heat to circulate but the thermostat wouldn't know that and it would start and run the fan continuously until a fire is built. and ....
2). You would still be running up and down the stairs monitoring the fires burn rate by opening and closing the lower door manually.

ALL the components you need are readily available from WW Grainger....basically : a fan/limit control
a thermostat
a 110v x 24v 40 va control transformer
a 24v spdt relay
20 ga. two conductor thermostat wire
24v actuator and linkages to mount to the existing combustion air damper. A bit of creativity is required here. I would not recommend retro-fitting a combustion air fan.
14-2 wg romex for wiring the fan control

Again, it depends to what extent you are willing to go to achieve the end result. Will it be exactly like a new system?? No, but it will operate a lot better than that which you describe.

Oct 24, 2014 | Home

1 Answer

Why heater fan will not come on?


Wish I knew how old your furnace is. Let me answer your question directly. In the heat mode the fan runs independently from the air conditioning fan relay. Its either brought on by time or temperature. An old furnace will use a fan and limit control that uses a coil to sense the heat exchanger temperature and turn the fan on or off. Newer furnaces use a timer on a circuit board. 20 years or newer Ill bet its a timer board. Follow the blower motor wires back to the component and ill bet that's the culprit. Hope it helps. Good luck.

Oct 12, 2014 | Heating & Cooling

2 Answers

I'm trying to install this Woods 59008 automatic fan timer in the bathroom. My old on/off switch only has three wires....and I that a light switch next to that. The woods 59008 has a red, black, white...


Sure George.

These in-wall timers have extra wire to operate the electronics located inside timer.
You said your old switch has 3 wires.
The new timer can only replace on-off switch that has 2 brass screws and a green screw.
If old switch has 2 brass screws and a dark screw, that is a 3-way switch.
Typically a 3-way switch is found at both ends of hallway.
The Woods 95008 countdown timer is not made to replace 3-way:
http://waterheatertimer.org/Woods-timers-and-manuals.html#59000

Here's what to do:
1) Switch has 2 wires (plus bare ground wire). Take switch wires and connect them to timer-black-wire and timer-red-wire. Choose either one for now.
2) In back of electric box are white wires twisted together and covered with wire nut. Connect timer-white to these wires. This wire will power timer electronics.
3) If electric box does not have white wires described above, then connect timer-white to bare ground, along with timer-green wire.
4) Turn on electricity, and push override button located below the OFF button. If lights come on, timer is wired correctly. If lights do not come on, then reverse timer-red and timer-black wires.

Add a comment if your need more assistance.

Dec 22, 2010 | Woods Ind 59008 Digital Timer

1 Answer

When main switch to heater is turned on, only the flame comes on - no heat or blower. Have tried numerous times to reset by turning main switch off for five minutes, but still does not work. Any...


Does the fan come on when you turn the Fan to ON at the thermostate? If it does then it could be the blower board not turning the low speed blower tap on. Or the Fan & Limit switch not working. If the fan doesn't come on in the on position then the blower motor could be out or the run capacitor.
If the blower comes on it the ON position then you can run the heat with the fan in the ON position till you can get the heat relay looked at.

Dec 21, 2010 | Heating & Cooling

1 Answer

I need to wire a 24 volt double pole double throw relay to operate a fan in a furnace parrell with a wood stove.


Your problem has really got me interested in what you are attempting to do. So are you looking to diable the FAU while the wood stove is heating or activate the blower motor for the FAU when the wood stove is hot?

Oct 30, 2009 | Goodman GMS90703BXA Heater

2 Answers

When I switch the T-stat to (fan on) the blower won't come on unless I move the Fan limit up close to the 100 degree mark and then I move that limit back down close to 130-135 degree and after approx. 10...


That fan switch is for the heating mode,when the burner starts, that switch won't allow the blower to come on until the combustion chamber is warm, so you won't have cold air blowing out of the ducts in the winter. It's usually set at about 120°. If your getting 24 volts to the blower relay for cooling and the blower doesn't come on then check across
the relay points for the blower and if you have
120 volts and the blower isn't running then that relay is bad and needs replaced.

Aug 13, 2009 | Heating & Cooling

2 Answers

When I set tstat to call for a/c, compressor outside comes on. Blower on furnace does not. When I manually rotate fan limit switch on furnace wall, blower comes on, blows cold air, and then goes off when...


blower relay bad or no call from stat on green wire to run fan jump red on stat to green if fan comes on stat bad if no look for fan relay turning the well switch bypasses the relay hope this helps

May 24, 2009 | Heating & Cooling

1 Answer

I have a Lennox Furnace Model # GS190-120-140. The unit will not fire up even after replacing the gas vaulve and the limit switch. The unit blower comes on as soon as the thermostate calls for heat. I have...


pull off all of your thermostat wires from the control board and make sure you dont have a shorted wire. if the fan still runs you could have a few other problems maybe a stuck relay in the motherboard control try to tap it on the little black boxes.

Jan 03, 2009 | Heating & Cooling

2 Answers

BLOWER FAN WONT SHUT OFF WHEN THERMOSTATE IS OFF


The compressor coming on when the contact is pushed is o.k. they all do that. As for the blower fan not shutting off, some brands (Payne for example) the heating fan relay is a n.c. (normally closed ) relay. so if the time delay relay or thermal link are bad or not connected, the fan will blow even when it is turned off.

Aug 19, 2007 | Honeywell CT87B ROUND HEATING&COOLING...

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