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Power surge now furnace does not work

Thermostat has no effect

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  • Dometic Master
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Look to see if there is a spark clicking noise when you advance the thermostat. If not, the electronic control board is most likely the problem.

Posted on Jan 05, 2014

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Posted on Jan 02, 2017

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1 Answer

Power surge and now furnace does not work and thermostat has no effect


maybe the fuse on main board is brokenand it must to change this.

Dec 26, 2013 | Dometic Heating & Cooling

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Coleman electric Furnace won't come on seems not to receive input from thermostat


There probably is a little transformer that runs the thermostat, at the furnace. If it is separate, it is easy to replace.

Nov 25, 2013 | Heating & Cooling

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Furnace problem


SHUT THE POWER OFF TO THE FURNACE, REMOVE THE THERMOSTAT FROM THE THERMOSTAT SUB BASE TAKE THE WIRE THAT IS ON THE R TERMINAL AND THE WIRE THAT IS ON THE W TERMINAL AND CONNECT THEM. TURN THE POWER BACK ON. IF THE FURNACE COMES ON AND WORKS FINE THEN ITS IN THE THERMOSTAT.

May 30, 2017 | Heating & Cooling

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Will not heat we replaced both elements but still no hot water rheem model no.82v522marlene we suspect we had a power surge during last storm because the furnace went out also at the same time


Hi I suspect your thermostat will have also been damaged if you had a surge I always replace thermostats at the same time as the elements
Also check the wiring as sometimes surges can melt the copper core of the wiring, but be careful always turn off the power first before any electrical works!

Mar 06, 2011 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

I have a robertshaw 9420 and the screen is blank it takes no batteries and the reset button has no effect. the manual is of no assistance what so ever


Hi,
You are not getting the 24v power from the furnace...
Either the furnace power is off... the 24v transformer went bad...
or there is a fuse that blew which is interupting the 24v power from the trnasformer...

The blank screen in other words is an indication of amuch larger problem...
you need to find that power problem and fix it...


ere is a tip that will help you try to figure out why your furnace is not working.

Basic Furnace or Heating System Troubleshooting

heatman101

Dec 07, 2010 | Shaw Robert RS-9420 Thermostat

2 Answers

RVP 8000 A/C just experienced slight power surge. Compressor on.


I'm leaning toward sticky relay as well, but if you want to confirm it's not thermostat, remove thermostat from wall, and temporarily disconnect the yellow wire from thermostat (compressor) when/if, it happens again. If compressor stays running, I'd say relay for sure.
Just for future reference , Gray wire from thermostat is low fan, green wire is high fan, yellow is compressor, blue is ground. ( For cooling side) The red is 12 v + to furnace and white is negative to furnace.(heat side)

Jun 10, 2010 | Coleman Mach 15 Air Conditioner

1 Answer

Thermostat not turning on furnace.


Hi, You need to go to the furnace to see if you have lost the 24 volt supply, the transformer. If you have a circuit board, see if it has a 3 to 5 amp fuse plugged into it that is blown. This will kill power to stat causing nothing to work. Let me no what you find and we can go from there.
Shastalaker7

Dec 29, 2009 | Heating & Cooling

1 Answer

I have an Evcon furnace Model # DGAT075BDF. It


Does your fan work from the on position. New tstat may have RC and RH need to jumper them. If that does not work. Turn on tstat check voltage on board at furnace between w and c if you have voltage you may have a bad board. Also see if there is any reset buttons like on the roll out switches. Smaa red buttons. Push them to reset. Let me know what going on. Rus

Dec 03, 2009 | Heating & Cooling

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