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Faulty 240 and 12 volt heaters

Rm4211

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Replace element

Posted on Jun 21, 2016

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Posted on Jan 02, 2017

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How to check the heating elements in GE harmony dryer


The heating elements are located inside the heater ducts. If you think a heating element is faulty, test it with avolt-ohm-multimeter (VOM)set to the RX1 scale. Disconnect the leads from the power terminals and clip one probe of the VOM to each terminal. The meter should read about 12 ohms. If the reading is higher ohms, the heater is faulty and should be replaced. Replace a faulty heater with a new one of the same type and electrical rating. A heater connected to a 115-volt line usually has an 8.4-ohm resistance; a heater connected to a 220-volt line usually has 11 ohms resistance.

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Why does Heater keep shutting off and on. Tech says everything looks ok by milli volt readings


problem is you either have a poor neutral connection, one of the safeties is opening and closing at times, or the gas valve is faulty

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I have a LX250N heater. When I attempted to start the heater this year to no avail. When I turn the heater on and raise the thermostat to demand heat I hear once click but the blower never comes on. Can...


safety circuit will not let blower turn on check to see if 24 volts ac on both sides of pressure switch if ok see if 24 volts at gas valve brown and yellow wires if not safety circuit open check copper tube to pressure switch to see if clogged

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Recently installed leviton combination switch was working correctly. Now when power is being drawn by the hot water tank it controls the pilot light goes out. Any suggestions or is the switch faulty?...


Pilot light switch is usually rated 15 amp.
Check amp rating of device.
Check volt and watt rating on nameplate of water heater.
4500watt element divided by 240volts = 18.75amps
http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html

If you have 120Volt under-counter water heater, then add a comment.

I recommend using contactor to control water heater when using a switch rated for less than 30amp.
Contactor controls water heater. Switch controls contactor.
http://waterheatertimer.org/Ordinary.html
http://waterheatertimer.org/H230A.html

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The water heater red light keeps flashing rapidly on my Powervent 2 model 41VRP40N. It is not producing hot water and when I read the manual it says it needs more heat. What does this mean. How do I fix...


There are many things to check. The single most important test is for 24V at the gas valve after the ignitor is supposed tp be on. 19 V or less and there is either a bad ground or the ingition control board has failed. (Wire ground problems are a high probablilty)

Here is what the book says:

PROBLEM #1 - HOT SURFACE IGNITOR DOES NOT GLOW RED

(Remember to wait for purge time, 17/34 seconds, on models so equipped).

Possible causes

A. No main power

B. Faulty transformer

C. Faulty thermostat

D. Faulty limit switch

E. Faulty blower interlock switch

F. Faulty hot surface ignitor

G. Faulty ignition control

Solution

Step #1

Perform normal system checks of main power, transformer, thermostat, limit

switch, blower interlock switch, and replace faulty component.

Step #2

With power on and thermostat set at its highest position, check voltage

between "TH" and "TR" on HS780 ignition control. If 24 volts is not present

check output at transformer. If no, replace transformer. If transformer

checks out OK look at other controls in the 24 volt circuit I.E.: thermostat,

limit switch, blower interlock switch. Check for 120 volts between "neut"

(L2) and "120" (L1). Check for 120 volts at the ignitor across "IGN" and

"IGN" terminals on the HS780 ignition module. If 120 volts is present,
replace ignitor. If no, replace the 780 series module

PROBLEM #2 - IGNITOR GLOWS RED BUT MAIN BURNER

WOULDN'T LIGHT

Possible causes

A. Improper ignitor alignment

B. Faulty ignition control

C. Faulty gas valve

D. High inlet gas pressure

E. Polarity reversed

F. No earth ground

Solution

Step #1

Check for availability of gas at gas valve. Make sure the manual valve

upstream of the gas valve and the gas valve are in the full on position. Also

make sure gas is being supplied to the system at the proper pressure, too

high will lock-up the valve.

Step #2

Check proper polarity of "NEUT" and "120" on the ignition control by reversing

the wires, if reversed gas valve will not open. If this does not solve the

problem, replace wires as they were.

Step #3

Check for proper ignitor position.

Step #4

Check for a good earth ground by using a meter connected between L1

and furnace chassis. Should read 120 volts, if no, check and/or repair ignition
ground wire or ignition control mounting screws.
CAUTION POLARITY MUST BE OBSERVED

Step #5

Check for 24 volts at the gas valve terminals; "1" and "2" on a 7200 series,

"M" and "C" on a 7100 series, "TH" and "TR" on a 7000 series. If yes,

check wire integrity or change the gas valve. If no, change the 780 series
ignition module.

That is pretty much all of the troubleshooting required.

Thanks for choosing FixYa,
Kelly

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1 Answer

Heater does not work


The heater not working.This problem is related to few possibilities 1) The thermostat can be faulty. 2) the heater blower motor resistor is faulty 3) The heater blower motor it self is faulty. ------------ The The blower resistor is behind glove-box on plenum.Connect the 12 volt battery directly to the heater blower motor and see,if the motor runs then its faulty resistor or thermostat.but if no motor running then its faulty motor. The thermostat is located at the top front of the engine.For easy access follow the top radiator hose.The top radiator hose goes in engine .Take that hose out and thermostat will be seen inside. --------- The thermostat and resistor are not very costly part.So you can directly replace them and see if its helping.First confirm motor is working,by directly by passing the blower motor to 12 volt battery. ------------ This will help.Thanks.Helpmech.

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Heater blower hooked up not working new resister and all good fuses


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We have a Bosch WTL 6301 , as the heater not working so what I can do , I have test the Heater and its Ok but no electric comes to it


Could be a faulty thermostat/s, or the timer control unit could be faulty.
The power goes to the thermostat/s before going to the heater.

Mar 09, 2010 | Bosch Axxis WTL 6106 Electric Dryer

1 Answer

It works on 240volts and gas but not on 12 volts. Why and how do I gain access to the parts that I must test?


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1 Answer

Indesit


If the water does not get hot, I assume the machine does not complete its programme? Since you have changed the stat, AND checked the element I think the timer may be faulty.
OR has a wire burned off in the heater circuit somewhere? You can test for a 240 volt supply at the two ends of the heat element with a meter, or even a 240 volt bulb.
!!BE CAREFUL!!  !!OF 240 VOLTS !!

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