Question about Dayton G73 Utility Heater

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I've only had my heater is operation for two weeks, with the thermostat set between the medium and high settings. The heater will not shut off and a smell of burning wires. I disconnected power at the breaker, is the thermostat bad already, not allowing the unit to shut off>

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  • travis199 Feb 02, 2010

    not sure, order online for grainger. I ordered a new thermostat, just curious if something else would cause this problem

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Themostat will be at fault for not shutting this off .. If two weeks old what kind of warranty was given?

Posted on Feb 02, 2010

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Sounds like it! Any burning smell in a heater is a risk of major hazard

If this heater is underranty it needs to be returned, continuing to use it may result in a fire.

Thanks for using Fixya

Posted on Feb 02, 2010

  • dennis bullard Feb 02, 2010

    If the thermostat fails to control the set temperature it continues to heat, often beyond its set maximum. one must suspect a shortout in the defective thermostat. This is usually the cause of the burning odour that can be present. There are usually heavy guage wires used to connect this unit. However despite being covered by heat resistant insulation net There is a limit to the heat it can tolerate before breaking down, and it can still catch fire. Some of these heaters have been found to have no insulation net, it need not be said where they are actually made!

    Replacing the thermostat may solve the problem, but check carefully for any other burned or scorched wire and have that replaced also. Initially, monitor the function of the thermostat to ensure that it is functioning as expected. Lastly never leave this on and leave the premesis. An earlier model was recalled due to faulty wiring.




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The heat exchanger is burning due to high limit saftey stat. What should I do


The high limits are designed to shut the heater off if the water temp exiting the heat exchanger gets too high. One is set at 135f the other at 150f. The thermostat should shut the heater off once the pool water gets to temperature.

I'm not sure what you mean by "burning". The operating temp in a 400K btu heater is around 2000 degrees. If you are getting a lot of "sooting" that is typically caused by low gas supply. That's where you get orange flame instead of blue flame. Can you give me more detail?

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I would try the thermostat one by turning it up to a higher heat. I feel the other one may heat on high but would not shut off. You would have to do it manually.

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Hi there, I'm hoping somebody can help me out? I have a washer/dryer and the dryer is not working. The drum rotates but does not heat up and the clothes are still very damp/wet Whilst the washer...


There are several reasons why a dryer would not heat up the clothes.
  1. The vent is plugged with lint or the blower set-screw is loose (blower slips on the motor shaft instead of spinning full speed). If you do not have good airflow at the outside exhaust when the dryer is running, you'll need to check the ductwork all the way back to the lint trap. If the lint trap is torn, repair or replace it.
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Bosch 2.5 gl water heater does not work. there is power to the unit but not action at switch or themostate. is there a high limit switch that can be tripped and rest and where is it


Ariston 2.5ga reset button is located on thermostat.
Following image shows location of reset button:
http://waterheatertimer.org/images/Bosch-Ariston-reset-400.jpg

Open following link for Bosch troubleshooting resources and link to your manual.
Read manual entirely to empower yourself and to avoid-anticipate problems.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

Manual says:
Occasionally, the high temperature limit shut off device may trigger and shut the
system down. This occurs when water temperature exceeds 190° F and shuts off
power to the heating element. The shut off device may also trigger from a power
outage or electrical storm.
To reach the thermostat:
1. Pry off the round cover plate (V Fig. 3/1) from its right hand edge (W Fig. 3/1) with
a small flat-head screwdriver.
2. Remove the Phillips screw revealed beneath the round cover plate.
3. The cover (C Fig. 3/1) can now be removed by pulling out its left-hand edge. When
reassembling, work in the opposite way being careful to insert the tongue of the
cover into the slot.
4. Firmly press reset button (B Fig. 4). Reconnect power.
5. IMPORTANT: Check the operation of the thermostat, turn temperature dial from
high to low, if the red light does not go off on low setting, turn off power supply and
call a service person to replace the thermostat.
6. If the system works, place dial setting to desired setting. Note: a lower setting is
more economical and reduces the risk of scalding. Replace cover plate.
CAUTION: Call a technician if the high limit needs to be reset frequently.

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1 Answer

My gl4 ariston the only way it will heat water is to reset it . It will heat water til it get hot and then you have to reset it to get the water hot again


Occasionally, the high temperature limit shut off device may trigger and shut the

system down. This occurs when water temperature exceeds 190° F and shuts off

power to the heating element. The shut off device may also trigger from a power

outage or electrical storm.

To reach the thermostat:

1. Pry off the round cover plate (V Fig. 3/1) from its right hand edge (W Fig. 3/1) with

a small flat-head screwdriver.

2. Remove the Phillips screw revealed beneath the round cover plate.

3. The cover (C Fig. 3/1) can now be removed by pulling out its left-hand edge. When

reassembling, work in the opposite way being careful to insert the tongue of the

cover into the slot.

4. Firmly press reset button (B Fig. 4). Reconnect power.

5. IMPORTANT: Check the operation of the thermostat, turn temperature dial from

high to low, if the red light does not go off on low setting, turn off power supply and

call a service person to replace the thermostat.

6. If the system works, place dial setting to desired setting. Note: a lower setting is

more economical and reduces the risk of scalding. Replace cover plate.
CAUTION: Call a technician if the high limit needs to be reset frequently.

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During the auto-drying cycle, the moisture sensor could be the problem.

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Judging by your pics (helpful, by the way) you have a high limit wired into your thermostat wire. Try disconnecting that wire nut connection in front of your valve and hooking the thermostat straight to the top and bottom posts on the valve (eliminating the high limit). If it runs fine, either the connection was poor or your high limit wire is pinched.

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