Holmes HFH5506, new out of the box. Thermometer in room (at same level) says 66. Heater is not coming on until control setting is at 74-78, even then, it comes on for 60 seconds only. LO or HI , no matter.
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It always helps to add the model number of the item you want help on. However if it's like the newer units, the fan operates whenever the heater wall has reached a high enough temperature and shuts off when the heater cools off. It is not wired into your thermostat or electrically wired to the heater. It does that with a temperature driven fan switch in a little junction box mounted to the heater. Normally when that box gets hot because the heater is on the fan comes on, when it cools off the fan goes off. The junction box will have an ac cord coming out of it. If this fan switch junction box is not properly mounted it could be getting cooled off when the fan starts and then shuts itself off. After it heats up again it starts the fan. The other possibility is the temperature based fan switch is failing and needs replacement. See link.
There are 3 settings for optimum air filtration. You can operate your Holmes air purifier continuously on the Medium (2) setting. It's rugged motor has been designed to give many years of use. For quieter operation (such as bedroom), select the Low (1) setting. When high levels of air polution are present, select the HIGH (3) setting to quickly circulate and filter the room air.
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Many recommend you plug the heater in and turn it on in a well-ventilated room (like a garage) for the few hours of use. If you are using the heater to warm a room, plug it in with the thermostat set to maximum and set the power selector to 3 until the room reaches the desired temperature. Then rotate the thermostat clockwise until you hear a click. You can set the power level to 1 or 2 to conserve energy while maintaining the current temperature settings.
If you are trying to avoid frozen pipes in an area, plug in the heater and set the power selector to 3 and thermostat to *.
Always remember to keep anything flammable away from the heater (loose drapes etc.) There is an overheating protection circuit built into the unit. To reset it, you need to call the DeLonghi service center.
You didn't include a model number, so it's hard to know for sure - but I'll take a stab at this one. Many of these t-stats have a programmable offset to reduce "hunting". This can be as little as 1 degree or more than 2 degrees.
This means if you set the offset to 1 degree and the room temperature to about 65 degrees, the furnace will heat the room until the t-stat registers a rising temperature of 66 degrees. The furnace shuts off and will not turn on again until the t-stat registers a falling temperature of 64 degrees. The average is 65 degrees, and prevents the furnace from starting and stopping numerous times instead of just once with the 1 degree offset.
You can further reduce the number of furnace start and stops by increasing the offset to 2 degrees. This would work like this when the t-stat is set to 65 degrees and the room is cool:
Room Temp Furnace 63 On 64 On 65On 66 On 67 On 68 Off
The room is now warm and heat or furnace is off. The room begins to cool like below:
67 Off 66 Off 65 Off 64 Off 63 Off 62 On
With a 1 degree offset, the room temperature varies +/-1 degree (about 2 degrees total). With a 2 degree offset, the temperature about varies +/ -2 degrees (about 4 degrees total).
Also, when the thermostat shut the heat off, the heat that was made is delivered to the space instead of wasted by sending outdoors - so the room will get a little warmer even though no fuel is being burned. The same holds true at the other end. When the t-stat turn heat on, fuel is burned, but there's little heat until the source has reached the optimum temperature and then the heat is delivered to the space.
I hope this helps & good luck! Pleas rate my reply - thanks!
Check your SENSOR. With the Minimax ch heater, you might be using an 'IntelliTouch' panel that controls your equipment. If you are, check the reading that the panel says the water temperature is and then check the temperature of the water 'coming out' (spa??) manually with a floating thermometer. When the heater cycles off, check the difference between the 2 numbers. Say the panel says 102 & the thermometer says 95?? - that is a faulty sensor, telling the heater that the water has reached 102, so it cycles off before ever getting hot. If you're not using the IntelliTouch, you will be checking the display panel on the actual heater itself & again the floating thermometer. Now...
if the temperature is less than a 4 degree difference you can always calibrate/or have calibrated the heater.
After calling Vornado Corporation, they suggested that the room temperature monitor might be failing as it read 65 degrees no matter where you started the heater. I took the unit back to the store I purchased it from, and we unpacked another unit and found the same problem existed. Therefore, the product is not capable of heating a room properly and I will continue my search for a space heater to control the temperature in my upstairs office which does not have air ducts for heat.
If anyone has recommendations I would be interested in their comments.
whats the room temperature ?the room temperature may effect the systems temperature,again the processor usage,or the particular heat sink attached to the processor if it dosnt dissipate much heat and instead circulate within can cause high temp so check that out