Our Lasko 5620 has a digital control, but we can't set the temperature. It says at 76 degrees, no matter what we do. Hitting the control buttons does not work.

The Peco TA-170 thermostat is designed to control both heating and cooling, and it appears that it may not allow for separate temperature settings for heating and cooling. However, you can adjust the set point temperature for both heating and cooling modes at the same time by following these steps:

1. Press the "SET" button to enter the programming mode.
2. Use the up and down arrow buttons to adjust the temperature set point. The display will show the current temperature set point for both heating and cooling modes.
3. When you have set the desired temperature, press the "SET" button to save the new set point.

To reset the thermostat to its factory settings, follow these steps:

1. Press and hold the "RESET" button for three seconds.
2. The display will show "RST", indicating that the thermostat is resetting.
3. After a few seconds, the display will go blank and then turn back on, indicating that the reset is complete.

Please keep in mind that resetting the thermostat to its factory settings will erase all programmed settings and return it to its default settings. You will need to reprogram the thermostat to your desired settings after the reset.

answer is in instructions
Save-Smart®
Press () to activate the Save-Smart®Function.
1.Set the thermostat to desired temperature using the +/-
buttons (Note: The default Save-Smart®temperature is 72 ? F)
2.When you reach the temperature at which you want to
set the unit, the set temperature will flash several times
and then the display will return to indicate the current
room temperature and will gradually change as the
room temperature changes.
3.When the air temperature is less than the set temperature,
the heater will run in HIGH heat.
4.Once the thermostat reaches the set temperature the heater
will automatically switch to LOW heat to save energy.
5.When the air temperature reaches 4? above the set temperature,
the heater will turn off. The Heater will cycle off and on in the LOW
mode to maintain the set temperature.
All this happens automatically with Lasko Save-Smart®Technology.
To deactivate the Save-Smart®function, press Save-Smart®
again or (hi/lo) for continuous high/low heat.

AUTOMATIC TEMPERATURE CONTROL(Figure 3)
The automatic temperature function will only operate on "High" heat.
You cannot set the temperature automatically when the unit is in the low heat mode.
1.To set the room at a specific temperature press the () or()buttons
to the desired temperature. The display will now reflect the () and the temperature will be flashing. The Heater is now in Auto Temperature Mode.
2.When you reach the temperature at which you want to set the unit, the set temperature will flash several times and then the display will return to indicate the current room temperature and will gradually change as the room temperature changes. NOTE: the temperature display does not indicate the temperature of the heated air being emitted by the heater.
3.Once the room temperature reaches 2 degrees above the set temperature, the Heater will shut off. Once the room temperature reaches 1 degree below the set temperature, the Heater will turn back on and continue to cycle off and on to maintain the set temperature.
4.This function will cancel if the ()button is pressed. The Heater will now be in High heat and run continuously.
NOTE:It is normal for the Heater "fan" to run for approximately 15 seconds when the Heater shuts off after reaching the set temperature.Press the () and() buttons at the same time to change the display to ° Celsius. Press the same two buttons together again to change the display
back to ° Fahrenheit.

Check your thermostat. Maybe it's cutting off ahead of the set temperature. May need recalibration or replacement.

Remember it is always colder at the floor level, the heater is pretty close to temp when it is above 40 degrees outside, but as the temperature gets colder outside so does the temperature at the floor level in your house because heat rises.

I use my house furnace thermostat mounted half way up the wall as a guide, When the temp outside is in the teens, I have seen as much difference between the floor temp on the heater and the wall to be 4-6 degrees different. So this means as the tempurature outside drops you need to regulate the thermostat on the heater downward to compensate for the colder floor temperatures.

76 is an error code. Look in the owners manual and it will tell you what the problem is.

if it is set to 76 degrees and its 78 in the house its working fine it is suppose to shut off once it reaches 76 but sometimes there is a 1 or 2 degree differential built ini would keep you filter clean and as long as it blows out cold air i wouldnt be to concerned most airconditioners need yearly cleanings though

From whatI have seen on base board heaters if I recall correctly, the thermostat may be sepperate. Usually thermostats on these have a round knob. 1 line goes to this and the other side of the thermostat goes to 1 end of th element and the othe line attaches to the other side of the element. Its possible you have the element wired in directky if it came without a thermostat and without instructions it may till be connected directly. You should have an L1 and L2 connection and hope there is a wire diagram on the cover.
THE reason these basebord heaters used to come without a thermostat is because they are (OR WERE)set up to add on additional heaters comming right on down the wall. At the last one you could tie in and get a correct rated thermostat installed in the center of the series.
Return to LOWES and ask them to remove the instructions and copy them for you from another like model. Or have them contact the manufacturer and request they fax a copy of instructions with a diagram. Also ask if the heater comes with a thermostat. It may stoill be sepperate in another kit. 

Underneath the heater element are two thermostats that are run in series with each other. Inside the wire that connects them is a thermal fuse that opened up. Replacing the fuse corrected the problem.

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