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Need to bypass therostat for residential furnace

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To bypass a t-stat for heat connect te red, green, and white wire together

Posted on Oct 19, 2008

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1 Answer

Wiring schematic for an old honeywell R8325C1020-8514 fan center relay..

Without a picture Mike, I'm not sure this answer is absolutely correct but.... most of the old fan centers had a multitap transformer so different colored wires were provided to connect to 110v, 208v or 230v. If thats what it is, white was common to the black for 110v. White was common to orange for 208v and white was common to red for 230v.

If you have red and black hanging loose, possibly the center is connected to orange and white with 208v power supply. Of course many times, the orange and red were interchanged with 208v OR 230v.

Another point is that virtually all residential gas furnaces operate on 110v and 208/230v operated electric furnace.

As stated above, without a picture this is just a reasonably educated guess....Conventional furnaces less than 15 years old typically no longer have fan centers.

Nov 29, 2015 | Honeywell Heating & Cooling

1 Answer

How do I bypass my Honeywell D896 vent dampner?

The furnace was probably originally equiped with a damper bypass plug that was removed to install the vent damper. Of course some were hardwired in as an accessory. But look inside the furnace vestibule or in the homeowner instruction envelop and see if the original installed tossed the plug in there during installation. That would be GREAT !!!!

Without the wiring diagram of the furnace AND the vent damper, I cannot give you specific input on the wiring. But the damper has to have 24v to operate it and there has to be a switch circuit for making and breaking the gas valve control circuit.

You may have to call a service company to get your issue safely resolved.

Dec 29, 2014 | Honeywell Heating & Cooling

1 Answer

I need a wiring diagram for a johnson corp. residential gas furnace

Contact the manufacturer/distributor directly to request the diagram.

Sep 09, 2014 | Heating & Cooling

1 Answer

Central air wont come on

Check the basics breaker on for a/c? Is furnace control switch and fuse good? Is thermostat turned to cooling? In my 40 yrs as a service tech these were the most found problems with residential service calls.

Jul 02, 2014 | Intertherm Heating & Cooling

1 Answer

How do you install circuit board in atwood furnace 8525? do I need to disassemble most of the furnace to do this?

I am not familiar with the model number. I have worked on all types of equipment and have never seen a system that required major dis-assembly to replace a board. What does it look like from the outside? Up flow furnace, through the wall with a split condenser, horivontal residential? Tell me what you can and l"ll probably be able to tell you exactly where and how. Thanks for trying Fixya.

Sep 11, 2013 | Heating & Cooling

1 Answer

On my therostat it show and talks about the R wire and the Rc wire. What is the differet?

If you would have a two transformer system..... The power wire from the furnace transformer would hook up on R and the power wire from the Air Conditioner transformer would hook up to Rc....

BUT most systems now only have one transformer...... So if you are using this thermostat you will need to put a jumper wire from R to Rc. So the Air Conditioner will work. Furnace is the source of the transformer. R/Rc,W,Y, C, on the Thermostat will Hook up to R,W, Y,C on the furnace and Two wire from the Air Conditioner would hook up on Y and C on the furnace.....Good Luck.

Apr 02, 2011 | Heating & Cooling

1 Answer

Ten yr old Goodman residential furnace won't light even though hot surface ignitor glows red for 1 or 2 seconds.

Make sure you have gas on. Tap on the valve as the ignitor glows. The valve may just be stuck. If not- I'm thinking the funace needs a new ignition module.

Jan 17, 2011 | Heating & Cooling

1 Answer

Doesnt blow cold

Need to know what we are dealing with. Is it a residential A/C ? Is everything running that you know of ? If the condenser & furnace are both running go to the outside unit, is the larger copper line sweating? (IT SHOULD BE COLD & WET). If not it may be low on refrigerant. (freon). Without more info it's difficult to go any further. Hope this helped.

Aug 27, 2009 | Heating & Cooling

1 Answer

Therostat in rv doesnt work right

Suggest you replace it.  If the unit runs on 12volts, a battery powered unit is fine.  Just connect the wiring to the appropriate terminals.

Nov 15, 2008 | Heating & Cooling

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