Question about Corona 23-DK Compact Heater

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Can't adjust flame

Control knob pulled out (came off) and when it is pushed back into place it no longer engages the ratchet mechanism to raise and lower the wick. It will only turn thru a very small arc and then stops.

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  • Teban Dec 08, 2007

    I disassembled the unit and it turned out that the upper part of the wick was so charred and carbonized that it couldn't slide. It wasn't a problem with the knob after all. Solution was to put in a new wick.

  • Teban Dec 08, 2007

    I disassembled the heater and found that the top edge of the wick was so heavily charred that it would no longer slide in response to the knob's movement. A new wick solved the problem.

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Can figureout how to replace the wick on my Corona 23 DK wick

Posted on Oct 13, 2009

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Sounds like maybe you need to reset the emergency shutoff:
Turn the knob all the way to the left, then depress the small lever that is inside the hole to the left of the knob. While holding down the lever, turn the knob to the right until it stops. If the unit is working right, you will hear a rachet-type sound, which resets the shutoff mechanism. You should then be able to adjust the wick.
You might want to check out milesstair.com. Lots of great info.

Posted on Dec 06, 2007

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1 Answer

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Be sure that the gas line to the heater is ON.

Looking at the Control Knob on top of the heater, you note that he knob has 3- positions: OFF, Pilot, ON.

Turn the control knob to the Pilot position and push down on it. If it does not go all the way in and your do not feel strong pressure pushing back at you, it is not directly in the pilot position. (Reposition the knob slightly and try again). Once You're sure the knob is directly in the pilot position and the knob is depressed, continue to hold it in and press the Ignitor button next to it. You will hear a loud click. If possible, watch the pilot assembly inside the heater when you do this. That way you can see if the pilot lit the first time. If not repeat, pushing the ignitor.

If the gas line had been turned off to the heater, the pilot may not light the first couple of tries, due to air being in the gas line. If that is the case, hold the control knob in until you smell gas, let off, wait 5 minutes and repeat the lighting sequence.

Once the pilot does light, continue to hold the control knob in for 1 minute. This will allow the Thermocouple to heat up completely. Ease off the control knob and the pilot should remain lit. If it does, turn the control knob to ON and the burner will light.

Now you're ready to set the temperature or comfort level. You do this by raising or lowering the flame height. The higher the flames, the more heat it puts out. The lower the flames, the less heat it puts out. The stripe on the knob represents the flame heights - Narrow stripe, lowest setting, widest strip, highest setting. Or your specific model may simply say Low, Medium, High.

If you do not have the Owners Manual for this heater go to http://www.desatech.com/
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1 Answer

How do i change the wick?


You need a pair of Pliers, a flat-tip screwdriver and a plastic bag (for old wick)
ALSO - make sure the tank is empty (or as close as possible)
1. Turn the control knob to OFF.
2. On the left and right side (bottom, just under the wire cage are two cabinet screws. Remove these.
3. Using the handle, lift straight up to remove the cabinet (entire upper assembly)
4. Gently pull off the wick adjustment knob (you will need to push in the little square button.
5. Remove the "dressing plate" (the ring about 3" high) that the "Off" "Low" and "High" markings. The chain attaches this the fuel cap, but you don't have to remove the cap. Just set the "dress plate" ring aside as far as the chain lets you.
6. Either trip the manual shut-off or push against the wobbly pendulum to the left of the control knob shaft to drop the wick all the way down.
7. Remove the four wing nuts that holds the heater on the wick assembly and carefilly lift teh sick assembly from the heater.
8. Reset the automatic shut-off, put the know back on temporarily and raise the wick all the way.
9. Turn the Wick Assembly upside down. Place the white plastic strip, packed with the new Wick, on the Wick Cover to protect your fingers.
10. While holding the Wick Assembly upside down, pull off the Wick Cover with a sharp tug.
11. Remove the Wick while folding it to the inside. (Remove the Wick Sleeve together with the Wick).
12. Take the new wick and insert the Wick pins into the three holes of the Wick Sleeve. (Make sure the short portion of the Wick is UP.)
13. Attach the Wick wo the retainer teeth of the Wick Sleeve stick into it, making sure the Wick fits evenly arount the inside with no wrinkles or bunching.
14. Fit the Wick and Wick Sleeve back onto the Wick Guide, making sure you fit the pins through the slanted grooves of the Wick Guide and Press on each of the three pins from the back, making sure they are inserted securely through the holes on the Wick Guide. (This is where most people screw up Wick Replacement, so make sure you get this right)
15. Turn the Wick Adjustment Knob to make sure the Wick slides up and down freely. (Note, the wick should automatically be set to 3/8 of an inch when fully raised.)
16. Turn the Wick Assembly upside down and replace the Wick Cover by: Align the four tabs on teh Wick Cover with the four screw holes on the bottom of teh assembly and snap it into place.
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1. Check electricity is on.
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3. Switch the fan off at the bottom left hand corner.
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Wait - ignition should take place in a few minutes and flames will appear on the left of the burner under the radiants.

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After the red warning light goes out you can adjust to higher settings.

The radiants do not glow on low setting.

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Good luck - no responsibility taken for the advice (but it is largely copied from my Vulcan heaters instruction manual which I still have (installed in 1967).

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1 Answer

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This is a simple fix as long as the oven is heating properly and the only problem is that the temp seems higher than what the temperature control knob indicates...

Purchase an inexpensive oven thermometer from the hardware store and place it in the center of the oven. Set the temperature control knob to 350 degrees F.

Check the temperature indicated on the thermometer in the oven after 20 minutes. If it's not within 5 degrees of 350, you'll need to adjust the oven's temperature control.

Turn the oven off.

Pull off the temperature control knob. You can usually pull it off by hand, pry it off with a thin screwdriver, or slide a piece of cord up behind it and pull.

Note which kind of temperature control knob you have. There are two types: The first has a screw in the shaft of the knob; the second has an adjustment dial on the back of the knob.

Adjust the temperature with the first type by turning the screw in the shaft with a screwdriver. Turn it clockwise to lower the temperature; turn it counterclockwise to raise the temperature. Turn the screw just a little bit in the appropriate direction.

Adjust the temperature with the second type of knob by turning the dial on the back of the knob. (This dial is held in place with a screw or a clip that will need to be removed.) Raise the temperature setting by turning the dial counterclockwise; lower it by turning the dial clockwise. The notches are typically in 5 or 10-degree increments.

Test the oven temperature again.

Repeat until you're in the right temperature range.

Good Luck!

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