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Where are the control board fuses for a Rheem RGVH-10EBRJR. Fan will not start at thermosat but will start with thermostat red and green wires jumppered.

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Two possible locations, one would be a small glass fuse or automotive type fuse located on the PC board. The second would be in-line of some of the wiring. The wiring diagram will indicate where it is. Make sure you have the proper wires leading up to the thermostat in order to turn the fan on. You will need a minimum of 3 for heating (R, W and G terminals).

Posted on Mar 12, 2011

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Posted on Jan 02, 2017

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RADIATOR FAN NOT KICKING IN


You do not need a thermostat for the fan to work but you will need a thermostat for the engine not to over heat. Put simply the thermostat controls the flow of water through the radiator cores so that the heat in the water has a chance to transfer to the cores and fins and away.. NO thermostat =too fast water flow = hot engine.. Fans work off a temperature sensor which tells the CPU when to activate the relay to switch on the fan. Check out the circuit for the fan including the sensor ,fuses, relays and wiring, and fan . Fix it properly so that you can enjoy driving

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Replaced Thermostat and now Blower Motor will not run


Sounds like a set up issue on the tstat. You say this is a packaged unit, inside the machine you should find where the tstat wires hook up. Typically red is power yellow is compressor orange is reversing valve white is emergency heat green is blower. Put red and green together, test blower. Then red green and yellow, make sure blower works again. If blower runs both ways it's either the tstat wire or tstat itself. Make sure you are landing wires on dedicated heat pump terminals, make sure in settings you are set up for heat pump with back up electric heat and TSTAT CONTROLS THE FAN. Good Luck. Also if there is a switch on the tstat for gas or electric on the back you want electric.

May 12, 2017 | Heating & Cooling

1 Answer

My Rheem Air Handler runs all the time,a/c works fine and cools the house but I want the air handler to kick off when not in use. It's model RBHA-14J00NFRA Volts 208/240VAC PH/HZ 1/60


IS your thermostat set to automatic on the fan switch? If so then you may have a stuck fan relay in the air handler. If it has an electronic control board the relay is on the board and the whole board would need replaced. If it is not a stuck relay then you could have a crossed wire from the thermostat to the air handle, usually the green wire from the t-stat, it could be crossed with the red wire that supplies 24 volts to the t-stat.

Jun 17, 2011 | Heating & Cooling

1 Answer

How to set a NOMA HTM311A thermostat


Go to the furnace, and see what the black is connected to. If it is not the Y terminal, disconnect it from the Y terminal at the thermostat. While you have the furnace open, check for a blown fuse inline to the transformer or on the control board. If the black was connected to the common or the transformer, and you connected it to the Y, and turned the thermostat to cool, you would have a direct short across the transformer output. You can use a black wire to control the A/C, but both ends need to be connected to a Y terminal.

If you still remember the where the 4 wires were connected to the White Roger thermostat, take note of the name of the terminals the 4 wires are connected to. That may help as sometime the colour of the wires are not always correct.

Or you really want to test it out:
connect RED wire to GREEN wire should turn on the fan
connect RED wire to WHITE wire should turn on the heat


Did you disconnect the power at the furnace first? Maybe you blew a low voltage fuse.

Make sure you increase the heat setting to go above the room temperature.
Thermostat wire color codes explained.
Please note. Not all installers use the proper color codes when they install or replace equipment. It may be necessary go go to the furnace or outdoor unit to verify what wires are for what purpose. Also be sure there are no splices in the wire that could change the wire colors between components.

R (red) or Rh (Red heat) 24 volts from equipment.
Rc (Red cooling) 24 volts from transformer in cooling equipment.
Note: If only furnace has a transformer and cooling equipment does not jumper Rc and Rh.
W (White) sends 24 volts to furnace control to start the heating cycle.
W2 (no standardized wire color, usually whatever wire color is available) controls second stage heat.
Note: W2 is most often used for heat pumps to control what is called emegency heat or Auxillary heat, and most often will use the white wire.
Y (yellow) often (blue) is used, controls cooling unit (outdoor condensing unit) also is used for heat pump heat.
Y2 (no standardized wire color, usually whatever wire color is available) controls second stage cooling.
G (Green) controls the fan "on" operation of the furnace/air handler. Also often is used to start the blower for many electric furnaces.
C (common) most often brown but can also be black or other color available to installer.
O (orange) Energizes heat pump reversing valve for cooling (Trane and most other brands).
B (Blue) Energizes heat pump reversing valve for heating (Rheem, Ruud and Weatherking).


Hope it helps.


Thanks for using fixya.....

Nov 29, 2010 | Heating & Cooling

1 Answer

Changed thermosat no power


Check for 24 volts across the red and white wire. If no, broken wire, bad fuse or bad board. If yes, bad thermostat.

Feb 16, 2010 | Carrier TSTATHCP Programmable Thermostat...

1 Answer

Rheem Criterion II - blower works OK w heat or AC, not by itself


does the blower do anything? turn the power off and take the lead that comes off of the "cool" ( wire from the blower motor) and hook it up to the outlet side of the door switch ( the wire that comes off the door switch and goes to the board) turn the power back on and push the door switch in this will allow 110v to the blower if the blower runs the blower is good

reatach all door switch wire and blower wire to "cool"

disconnect all low voltage terminal wires at control board from thermostat make a jumper with a seperate wire from R to G if it runs it is your Thermostat or the wires inbetween the two

if it doesnt you probably have a burnt solder spot on the back of the control board and will need to replace the board

hope this helps

Jul 12, 2009 | Heating & Cooling

1 Answer

Replaced Fuse on Board. Unit keeps running


Sounds like crossed or shorted wire going to the thermostat. Disconnect the wire from the thermostat and see if it shuts off. If it does, it is the thermostat. Then disconnect either the white wire or red wire at the control board and see if the furnace shuts off. If it does, its the wiring. If it continues on, it is the control board. Remember you will need to tape the access panel door switch to the on position to be able to run the furnace with the panel off.

Nov 22, 2008 | Goodman GMS90703BXA Heater

1 Answer

Air handler


This should be doable: First get pen and paper-start at the furnace, theres a group of 5-8 wires leaving the furnace anfd going to the thermostat and a group of 2-3 going to the condenser outside that all need to be identified and the location in the furnace recorded if your furnace has a control board simply right the letter and the corresponding wire color:and whether it belongs to the condenser grp or the T-stat grp.

Furnace
R-red-to t-stat
C-yellow to cond
Y-red to cond and yellow to t-stat
G- green-to t-stat
W- white- to t-stat

If you dont have a circuit board youll be doing the same thing but using the components rather than letters;

Transformer 24v- red to t-stat
transformer 24v com -yellow to cond
Red from cond connected to yellow from t-stat
fan relay - green to t-stat
gas valve - white to t-stat

K then go to you t-stat and simply connect the corasponding component or leter to the thermostat gterminal

Cond Furnace Thermostat

yellow com- blue -C or B
gas valve or w-white -W
fan relay or g -green -G
trans 24v or R -red - R
red connection to cond or Y on board -Y
Hope this helps.

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2 Answers

Air Conditioner malfunction


Hi, Sounds like you have a short in the control circuit to me. Turn off all power going to the unit. Write down or otherwise mark the wires leaving the control board going to the thermostat. Remove them from the control board. Replace the fuse. Turn power back on and see if the fan still runs. If it does, check and or replace the heat limit switch that brings the fan on during the heat cycle. It may just need adjusted. If the fuse blows, I would think that the control board is probably bad. If it doesn't blow, Remove the thermostat. Leaving all thermostat wires open check them with an Ohm meter. There should be no continuity between them. Twist all the wires together at one end and ohm them again at the other end. You should have complete continuity on all wires. If the wiring checks out, down power the unit. Double check your wire colors and rewire the control board. With all wires open at the thermostat, turn the power back on. Touch the RED wire to the YELLOW wire. The Condensing unit should come on. Touch the RED wire to the GREEN wire. The fan should come on. Touch the RED wire to the WHITE wire. The heat should come on. Down power the unit. Replace the thermostat. Test unit. If the fuse has lasted ok but blows now it is either wired wrong at the Thermostat or the thermostat is bad. I hope I have helped. NOTE: If you can not understand these instructions. Call a licensed Heating / Air conditioning company. kstfas

Sep 23, 2007 | Heating & Cooling

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