RE: Honeywell HZ910-19 space heater.
This heater works great but all of a sudden it's turning itself off. I have to hit the reset button on top of the unit to get it back on. Can anyone tell me why it's doing this and how I can correct it?
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Re: Heater turns off
First, turn it off.
Start by cleaning your filter and making sure your thermostat is turned all the way up.
second, it's possible that the pilot may need to be cleaned and /or the pilot is not getting gas to it. Other than this, it would be best to have a technician check out the heater.
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If I understand your concern, it is that the heater switches itself on for 10 seconds and then switches itself automatically off. A couple of ideas of you may want to explore/check:
the built-in protection system detects an internal fault and to prevent any further damage switches itself off;
the faults could be:
open heating element (assuming it is electrical);
blower not turning;
open limit switch. The limit switch is an inline cutoff to the heater that automatically opens up when the heater exceeds a pre-determined temperature independent of the settings in the thermostat. This is like a thermal fuse once gone bad will remain open;
whereas a thermostatic switch will turn on if temperature is below its threshold and turn off if the temperature is above. It is basically an on/off switch.
Often the limit switch would look like the image below.
To be able to provide a more detailed information/assistance, pls verify & post back the model number of the Day Night Heater. Model 8ou-19 does not turn up anything. Or perhaps you can share the website you were referring to.
Good luck and Thank you for using FixYa. Happy Holidays.
Your prob is their is a thermostatic solinode that is trigger the unit to go off--because it thinks itself as too hot and unsafe to be on--this trigger was defective or damaged by disuse and/or fatigue------give it a shake-- better yet, when cool and unplugged-vacuum or blow out with compressed air-with out disturbing integrity of workmanship on device--if that no worky--time for new one---thermostatic element is dirty, device being of differing Mghz than outlet, if fairly new device--amperage of outlet is too small for device to work properly. If it is a 240 volt or a 120 volt device and your attempiting to use the wrong voltage outlet--STOP USING THE DEVICE
the thermostat is a variable rotation type. turning it in one direction varies a gap on a set of contacts mounted on the inside of the front panel. take the heater apart by taking out the four screws in back. the front panel should come off and you'll see the thermostat contacts. rotate the knob and see what the contacts do. if they make up, your element might be shot.
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.
I had all the same problems. It turned off - still oscillates - no heat. Tried resetting - tried waiting (thought it might reset itself); Final solution ---took it back to Fleer Farm for a full refund even though it was over a year (had kept box & receipt). Honeywell wanted $10 shipping (for a replacement) plus the $10 I needed to ship. Considering I only paid $27.99, we opt'd for the return. I now have a Black/Decker Model 200UH that is built like a tank and keeps my old body reasonably warm in chilly Wisconsin.