Question about Lasko 5365 Ceramic Compact Heater

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Won't shut off when reaching preset temp

The heater will not react to the temperature setting and shut off when the preset temp is reached. It had been working great and suddenly developed this problem.

temperature setting problem

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Re: Won't shut off when reaching preset temp

The heater shuts off when it reaches two degrees above the set temperature and turns back on when it is two degrees below.

Posted on Mar 25, 2008

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I have a rlv4300 wired to a fan forced wall mounted heater when desired temperature is reaches heater shuts off for 3 or 4 seconds then comes on again over and over is this normal

The temperature delay has a setting (on some) that needs a differential between the on and the off temps, if this is too close the residual heat extracts when it climbs to the on temp then cols to the off and then climbs to the on again, its not normal but is efficient and is not allowing the unit to overheat but if the differential can be set wider it is the answer.

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Have you checked with a thermometer to see if the area is reaching the temp you have it set at? A thermostat has nothing to do with the temp in your house. If you have it set at a temp for Example ( 72 ) and it is not reaching that temp to shut off then you have a problem with your unit or insulation in house. If you set stat on cool at 72 and the house gets down lower than 72 then there is a problem with stat.

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That sounds normal. When the bonnet reaches a preset temperature the burner turns off then when it cools down a bit the burner turns back on. Clean filters etc will help to keep the burner on longer in a cycle.

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1 Answer

Temp doesn't shut down when preset temp reached. Have to do it myself. Set it for 62 for example, won't come on till I set it to maybe 70. Try to set the temp to maybe 65, doesn't shut down till we...

This is normal. It will only turn on when the temperature set is below the ambient temperature in the area around the thermostat.

Your problem may be the location of the thermostat is not ideal form the areas you are heating. this usually cause the temperature in areas vary from the thermostat to the point wher relocation of the thermostat is sometimes the best resolution.
this is often the case wher ther are multiple heating zines in a building, and one or more zones interfere with the thermostat of others,

but it also happen in single zone heating systems too.

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Heater slow coming back on after having reached temperature.

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There are dip switches on the main board.. When you remove the lower panel on the air handler there are instructions to where the dip switches should be for your units fan control. if the switches are in the correct configuration.. The Thermostat may be malfunctioning or not wired properly. and last.. and most expensive.. the motherboard may also be failing.

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Won't shut off when reaching preset temp

Sounds like a thermostat problem or a short in the wire. Can you give us more info like is it gas or electric and model numbers will help.



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