Honeywell HZ-680 Oil Filled Radiator Heater - Answered Questions & Fixed issues

The heating element could be burned out.

Honeywell HZ-680... | Answered on Aug 01, 2015 | 162 views

The heating element may have burned out.

Honeywell HZ-680... | Answered on Aug 01, 2015 | 140 views


Check out this tip that I wrote about space heater problems..

DeLonghi Space Heater does not Heat


Honeywell HZ-680... | Answered on Feb 15, 2011 | 520 views


Here is a tip that I wrote that will help you to understand about oil filled radiator heaters....

Oil Filled Radiator Heater Leaking


Honeywell HZ-680... | Answered on Jan 28, 2011 | 334 views

These heaters last about three years,and are throw aways,unless you have some in the ole shed like I do.Checking the switches is the first thing to do,remove them to see if they are burned up on the other side where the connection is.If they are,that could be the smell,or the thermostat is melted down,and smelling,again,throw away,,or save it,and buy a new one,and you will have parts for when it goes out,if the switches are melted down,a compatible switch,if found,can be replaced in the heater,but something made the switches melt down,most likely a heating element in the tanks,non replacable.

Honeywell HZ-680... | Answered on Jan 05, 2011 | 512 views

If it is leaking ,when it gets low enough,the heating elements will burn up,it is best to trow it away,and buy a new one,getting parts for these are an act of congress and you can buy a new one for the cost of repairs,and the tanks can not be fixed,or filled.

Honeywell HZ-680... | Answered on Jan 04, 2011 | 122 views

I would just use a good warm water and soap solution and rinse it with warm water. I would take care around the electric controls on the front panel so as not to have water enter. I would not use any solvents, as they can eat the plastic and possibly ruin the paint finish.

Honeywell HZ-680... | Answered on Dec 07, 2010 | 34 views

Pl check the manual. There are certain heaters designed this way! I can not comment unless the manual is read.

Honeywell HZ-680... | Answered on Sep 23, 2010 | 107 views

make sure the thermostat dial is not turned all the way down. The red rotary dial, set it to 6.

Honeywell HZ-680... | Answered on Dec 30, 2009 | 452 views

So, are you looking for a replacement wheel? I'd look for the nearest Parts & Service facility (in your owners manual), call them and get a price.

Alternatively, I'd consider looking in a local big-box home improvement store for casters that could fit to replace all of them, possibly for less than the OEM replacement part(s).

Or are you seeking a different solution? From your statement above, I'm forced to guess.

If I can be of further assistance, or if you have questions about any of my response(s), please let me know before rating me.

If this solves the issue, please rate it accordingly. My goal is to earn a "Very Helpful" rating from everyone I help.

Thanks for using,


Honeywell HZ-680... | Answered on Dec 29, 2009 | 279 views

here is a REAL solution... as i just fixed this myself... what you need to do is take apart the heater... this is easy to do, all you need is a screwdriver for this part... on top there is a panel, this can be taken off with a butter knife if you dont have a screwdriver... anyways, underneath this panel are 2 screws, take those out, flip the heater upside down, and take out the other two screws... now the whole side panel will come off... after that, you pull all three plugs off the thermostat with the heater on the flat side opposite, next use a pinch pliers to remove the bolt that the the plugs were just attached to, the next part they tell you not to do, well i guess they tell you not to do any of this... lol... but yeah, put engine oil inside... it heats the same as the heater oil... put the plug back in, and use Liquid Nails clear sealant under the electrical stuff (do not put it on the metal part surrounding it as this will be come a fire hazard then) reconnect the plugs in the order you took them off from (white one is on the bottom) put the heater back together and you are golden! XD hope this helps!

Honeywell HZ-680... | Answered on Mar 15, 2017 | 1,283 views

I happened to be sitting here with a manual looking for a retail price so I could price it for a yard sale on Sat. I could email a scan (It's not lenghty)

Honeywell HZ-680... | Answered on Apr 06, 2009 | 476 views

email me at

I have the part you need


Honeywell HZ-680... | Answered on Mar 07, 2013 | 618 views

Thermostats have multiple issues when you start checking them against thermometers.

1) the built-in thermometer may not match the set temperature because one or both need calibration. Compare the built-in to an external thermometer and see if there is any adjustment to make them match. Record the setting on the thermostat and the temperature when it starts and stops -- there should be a 1-3 degree range which may be adjustable. The set point should be in the middle of the on-off temperature spread.
2) the thermostat has a heat anticipator setting which may be set poorly -- turning off the heat before it reaches the set point - the fan normally runs for 1-2 minutes after the heat source is off. The anticipator is used to stop heating before reaching the set point as there are still a lot of BTUs coming out during the fan run-down -- usually 1-2 minutes.

Honeywell... | Answered on Oct 16, 2019 | 39 views

Actually the 24 hour time makes it easier to correctly set the thermostat for when you want it to change setting.

Honeywell... | Answered on Oct 03, 2019 | 44 views

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