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Problem with thermostat

I bought a delonghi HVF 3031 fan heater yeterday.according to manual , in order to adjust thermostat, i turned thermostat knob to maximum position then I selected the power level. At desire temperature , i gently turned thermostat anti -clockwise till the click sound heared and fan turned off. The problem is it doesnt stArt automatically when temperature drops. I would be grateful if you can help with this issue.

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Try this. Do as you already did above, but this time turn the thermostat slightly clockwise till it comes on again, and leave it at that setting for a while. Does it control now?

Posted on Jan 01, 2014


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 686 Answers

SOURCE: Adjust Delonghi oil heater thermostat

you can't

Posted on Mar 01, 2009

  • 2176 Answers

SOURCE: button on wick adj. knob won't engage to remove or adjust

the wick could be dirty and or burnt not allowing for the know to be moved to the off position, I would suggest cleaning the wick or replacing before doing anything else.

Posted on Dec 08, 2009

  • 215 Answers

SOURCE: a/c and heater not turning on. Thermostat may be

Make sure the cover is on the furnance and secured properly, the next thing to check is the switch located on the side of the furnance it could have been accidently move to the off postion. If these two check out you will need to replace the thermostat.

Posted on Dec 14, 2009

  • 182 Answers

SOURCE: how to adjust a programmable thermostat I just

I am sending you this link which contains the users manual. I hope this helps.

Posted on Dec 29, 2010

  • 9472 Answers

SOURCE: My Laars Lite 2 Heater was heating the water, but

Here is the manual for your unit. Look at page 32 for troubleshooting the "temperature control circuit". There is also a wiring diagram and parts ordering list in case you need it.

Regards, Richard

Posted on Aug 03, 2011

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I have a Lochinvar pool heater that on the dispaly is showing Air Pressure Switch Open. I looked at the manual and it talks about air flow from the supply vent and exhaust vent. Than it says about...

Hi and welcome to FixYa, I am Kelly.

Try this before taking anything apart to far:

The pressure switch is located in the front header, behind the

upper side jacket panel, above the water connections. When

required, the pressure switch can be reset with the following


1. Clean filter and skimmer.

2. Start filter pump.

3. Set digital thermostat to highest setting.

4. Turn the adjustment knob on the pressure switch clockwise

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5. Slowly turn the adjustment knob counter-clockwise until the

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7. If the heater does not shut down immediately as the filter

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8. Reset thermostat to desired temperature setting.

If after doing all of the above you still have the problem.... you can remove the switch and check for debris in the water passages. If you find debris remove it, reinstall the switch and repeat steps above.

- Still have the problem... Replace the switch.

Thanks for choosing FixYa,

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Vulcan oil heater

1. Check electricity is on.
2. Check oil is in the tank and valve turned on.
3. Switch the fan off at the bottom left hand corner.
4. Switch oil knob to No.1.
5. Set Air knob to No.3.
6. Operate re set button (right hand corner of heater under settings dial). Either press in until it clicks or if the pull out version pull out until it clicks.

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.

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You can adjust the heater on to higher settings but this should be done gradually - no more than 2 settings at a time.

Some warnings:

* The unit must be correctly earthed.
* Do not use anything except heater oil.
* Never attempt to re-light the heater when it is hot.
* If the red light does not appear when the oil knob is switched on, immediately turn the oil knob off. Reasons include: Heater is too hot; Electric plug turned off; failure of ignition system.

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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