Question about Fahrenheat FUH5-4 Heater

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Fahrenheat 54b won't stay running long enough to heat

My heater starts and shuts off. Won't stay running long enough to heat

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Fan maybe running to slow and allowing the elements to get too hot and open circuiting the cut out. This will be a fault with the fan or maybe dust and debris in the intake vents.

Posted on Dec 22, 2013

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Therinnaiguy
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SOURCE: Fahrenheat 4000 watt wall mounted heater shuts off and needs reset

Sounds like a bad temperature control switch. If it looks like it can be replaced, check with Johnstone or Grainger Supply company to match it up. Google it for their websites.

Posted on Dec 07, 2007

Buffalo12980
  • 625 Answers

SOURCE: fahrenheat wall unit

your on-off switch is faulty - need to replace it.

Posted on Dec 09, 2007

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SOURCE: Parts for Fahrenheat F2543 baseboard heater

Go to Home Depot, buy a new one, take the part you need, return the rest...

Posted on Oct 12, 2008

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SOURCE: Fahrenheat F25408 Electric Baseboard Heater noise

Check model and voltage of heater to be sure your heater voltage is compatible to the voltage supplied.

Posted on Oct 26, 2009

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Here is the link for the owner's manual. Or call customer service at 1-800-654-3545. http://www.manualshelf.com/manual/fahrenheat/fzl4004/instructions-assembly.html

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My fahrenheat fuh-54b won't stay running long enough to heat


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Do you have t sat fan switch in on position??? If so blower will run continously set it to auto and it will cycle with heat call

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I know this heater worked well. I moved it to another location and had a professional electrician hook it up. It now kicks on but will not stay running long enough to heat anything up. It will shut off...


i take it has a remote thermostat, just remove the 2 wires from it and hold them together, if the unit stays on then it's your thermostat. if it goes out..maybe you overheat safety switch is kicking in..

Dec 19, 2010 | Fahrenheat Ceiling-Mount Industrial Heater...

1 Answer

The heater does not stay on long enough to heat my garage. it will come on for 3 to 5 minutes and shut off. it comes on again in 5 to 10 minutes for 3 to 5 minutes again. the heat is good when it runs....


You could tripping the high temp limit this will be located near the heat exchanger When it shuts how long does the blower motor stay running? Do you have a meter?

Dec 15, 2010 | Fahrenheat FUH5-4 Heater

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I have a fahrenheat wall mounted heater, 120 v model,(can't find a model number on the unit) with a dial temp control. No matter which number setting it is on, the unit cycles off after about 50 seconds....


UNIT SOUNDS LIKE ITS SHUTTING DOWN ON A LIMIT SWITCH IN HEATER. THEY LOOK LIKE ROUND BUTTONS OF DIFFERENT SIZES. THE HAVE 2 WIRES GOING TO THEM AND THEY ARE A NORMALLY CLOSED. THERE IS A FAN DISK NORMALLY OPEN TO UNTILL IT GETS HOT AND CLOSES TO TURN ON FAN.  IF THE FAN SWITCH TAKES TO LONG TO CLOSE THEN LIMIT OPENS TO PROTECT FROM OVER-HEATING

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Hi, I just purchased a FUH-54B at Northern Tool and Equipment and installed it this evening. I have a 30 amp double pole breaker installed, and I have 120V at L1 and 120V at L2. The ground is properly...


It sounds like you have 120v from line 1 and line to to ground. What do you have between line 1 and line 2?
You should have 220 or 240v. If you dont have this
the problem is at the breaker. Are the wires going to the same breaker?

If you do have 220 or 240 between line 1 and line 2 at the unit, then it appears thr problem is at the unit,
probably the thermostat isn`t turned up high enough?

If it has a contactor, is it pulled in? If not then there is
a control problem. If you are skilled and confident you
could simply push the contactor in and it should
operate or have an electrician do it. Most of the time
you can bypass the thermostat and close the
contactor that way.

Jan 04, 2010 | Fahrenheat FUH5-4 Heater

1 Answer

Fahrenheat fuh 54 b does not run long enough to get garage warm


have you checked what the operating amps are vs. the amps provided by the outlet. Sounds like you are trying to pull to much load and the machine probably has a saftey to where it shuts down bofore it buns itself up. Hope this helps. You have to be real careful about overloading circuts.

Dec 19, 2008 | Fahrenheat Ceiling-Mount Industrial Heater...

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