Question about Holmes Products HOH2520-U Heater

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Control panel blinking

My oil filled heater Holmes HOH2520U was working then just shut its self off. the control panel just blinks unless the temp is set to room temp. PLEASE HELP

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  • holmesblink Jan 22, 2009

    I have the same problem and am currently searching everywhere to resolve this.

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My heater did the same, very frustrating. i have solved this problem.  i took off the plastic cover to expose the electronic circuit board and noticed that there was a white residue on the board. I wiped this clean with rubbing alcohol and put everything back. as of 3 weeks ago i have used the heater frequently as normal and not had any problems. chazdee

Posted on Apr 19, 2009

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Worked for me also. I had some coins down in the circuits too (4 year old). Working fine now, no more blinking.

Posted on Nov 30, 2009

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SOURCE: my oil-filled Holmes heater HOH2520U

I have two of these Holmes 2520 heaters, and strangely enough the one that shuts off and blinks is not under recall notice, and the one that works like a champ is. So I phoned Holmes and was told that ALL 2520 heaters are under recall. Phone them and send in your cord for a new heater!!!

Posted on Nov 03, 2009

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How do you program this heater


temp setting
1. press the temp/timer button untill the temp icon blinks
2 use up and down arrows to set temp.3 the temperture icon will stop blinking and the current room temperture will appear after desired temp. is set.
4 the heat will turn off shortly after the desiredtemp. is reached and the temp. ndisplay will blink.
5 the heater will turn back on when room temperture drops below the set temp.

timer : auto -off press the temp/time button untill timer icon blinks. the hour display will apear. the auto off icon will also appear.

2. use up and down arrow buttons to set the heater operation time between 1 and 10 hours. this function will activate once the timer icon stops blinking.
3. the heater will automaticly turn off when time runs out.

set temperture first so heater will cycle on and off till shut down time reached

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1 Answer

Will not turn on. Unit has been working great until tonight. Was on but now off and will not come on. Unpluged it for an hour but still not working.


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The Holmes Comfort Temp ceramic heater works fine on Low setting, but once it is set to High temperature the illuminated digital display fades out and the unit turns itself off. Unplugging and letting the...


These heaters were not designed to be serviced in the field. If it's not over a year old, it may still be in warranty. Contact Holmes through there website www.holmesproducts.com for more info.

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1 Answer

Heater is not coming on


That makes sense, you were pulling well over over 20 amps. It doesn't make sense but it appears the heater failed. I would assume the heater has an electronic control that got zapped by the surge generated by the vacuum cleaner when the breaker tripped. If it is not an expensive heater just get a replacement. Unless you are experienced in repairing these things it is much safer just to replace it.
Good Luck,
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Patton POH2520-U heater not working


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3 Answers

My oil-filled Holmes heater HOH2520U will not heat now. it was working for a while the shut its self off and now the control panel is constantly blinking unless it is set at the room temp. HELP PLEASE


I had the same problem. this is what i did. unplug the heater. removed the plastic panel to expose the control panel where the blinking light is.  Removed all the dust and cobweb build up, then using rubbing alcohol, wiped the white residue that was on the green circuit board. I did this 10 days ago and the heater has been working fine since then. chaz  

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1 Answer

Honeywell HZ-705.....HELP!!!!


Should have oil in it. I don't think you can refill it. If it has leaked out, it's probably no good. Anyway, here are the instructions.


Press the *power button* once to start the heater on high power, continuous run. If left at this setting, the unit will run continuously on high power (1500 watts, 12.5 amps) and will not shut off until the unit is manually turned off.
Press the *power button* again, to change to low power, continuous run, (900 watts, 7.5 amps) and will not shut off until the unit is manually turned off.

Set temperature:

Press the temp/timer button until the temperature icon blinks. Use the up and down arrows to set the desired temperature.
The temperature icon will stop blinking and the current room temperature will reappear after the desired temperature is set.

The heater will turn off and on to achieve the desired temperature.

Set timer: (auto off)

Press the timer/timer button until the timer icon blinks. The hour display will appear. The auto off icon will also appear.
Use the up and down arrow buttons to set the heater operation time between 1 and 10 hours. This function will activate once the timer icon stops blinking. The heater will automatically turn off whn the times runs out.

Set timer: (auto on)

Press the temp/timer button until the timer icon blinks. The hour display will appear. The auto on icon will also appear.
Use the up and down arrow buttons to set the heater start time between 1 and 10 hours. This function will activate once the timer icon stops blinking.
The heater will automatically turn on when time expires.

Hope this helps!

Aug 17, 2008 | Heaters

3 Answers

Heater shut off but doesn't turn on by it'self


Do not touch the timer, once you do, it activates it. Set the temp. and leave the timer alone, unless you want it to shut off at a given time, 1 hr. and up. Once the timer shuts off you will have to start it manually.

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1 Answer

Honeywell oil radiator


Press the *power button* once to start the heater on high power, continuous run. If left at this setting, the unit will run continuously on high power (1500 watts, 12.5 amps) and will not shut off until the unit is manually turned off.
Press the *power button* again, to change to low power, continuous run, (900 watts, 7.5 amps) and will not shut off until the unit is manually turned off.

Set temperature:

Press the temp/timer button until the temperature icon blinks. Use the up and down arrows to set the desired temperature.
The temperature icon will stop blinking and the current room temperature will reappear after the desired temperature is set.

The heater will turn off and on to achieve the desired temperature.

Set timer: (auto off)

Press the timer/timer button until the timer icon blinks. The hour display will appear. The auto off icon will also appear.
Use the up and down arrow buttons to set the heater operation time between 1 and 10 hours. This function will activate once the timer icon stops blinking. The heater will automatically turn off whn the times runs out.

Set timer: (auto on)

Press the temp/timer button until the timer icon blinks. The hour display will appear. The auto on icon will also appear.
Use the up and down arrow buttons to set the heater start time between 1 and 10 hours. This function will activate once the timer icon stops blinking.
The heater will automatically turn on when time expires.

Hope this helps!

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1 Answer

Heater will not operate!


did you take it apart to see if the switch is good or the thermostat was functioning?  without looking inside, other than saying it don't work, isn't going to solve anything.

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