When I'm in a traditional sauna like this, I expect the temperature to be between 70 and 90C so that's what I assume you are trying to reach. There could be several reasons for this so make sure each point is checked:
1. Stating the obvious, to increase the temperature inside the sauna, you'll have to ladle water onto the hot sauna stones.
2. Maybe the insulation within your sauna isn't good enough and heat is escaping.
3. Your sauna room could be too big for this heater to heat properly.
4. Maybe the element on the heater isn't performing properly and needs to be replaced.
These were some pointers which Di Vapor gave as possible reasons for lack of heat.
Sauna Electric Heaters Spares
The connection is still not correct. I would make the company that did the repair incorrectly the first time come back and do the job right. If the timer was faulty before they replaced with a similar kind timer that did not match the original. You already paid the company once to do the job, they should be made to do it properly and repair any damage their tech may have caused with the improper wiring when the new timer was installed.
When the switch is ON, the light operates in dusk-to-dawn mode. In this mode, the light automatically turns on at sunset and turns off at sunrise. When the switch is off, the light stays off.
Press P (program )on the timer and display will show then change the desired day, time and minute using the D+, H+ and M+ buttons. Press P again to set up another program and repeat the second step as above
Clear memory by pushing the reset button on the timer then reprogram using your current schedule when you want the timer to go off/on. Use the day and clock buttons for this then press enter
No, the timer should not make any noise. The noise should be a result of loose connections which cause arcing, which can make a humming or buzzing sound.
If you find that you still notice the sound, even when the main breaker is off then the problem is not electrical in nature.
Question edited for clarity and add a header in order with spaces and CAPS.
It appears Micromark got out or the timer business. There is a similar one in another Fixya post, and a link to them.
https://www.google.com/search?q=Micromark+MM+9565+timer
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The clock is set. • To set timer, press any button to enter timer mode. A timer icon will appear on the LCD screen. Press the and buttons to set the timer.
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The Sharp Air Conditioner Remote Control CRMC-A310JBEO comes with two timer-related functions: TIMER ON and TIMER OFF. To set the timer on the remote control, press the Timer button, then use the Temp + or Temp - buttons to set the desired time. Wait 3 seconds, then the timer function will be activated. You can turn off either function by setting its timer to "0.0h".
Try a Power Reset. Disconnect all mains power to it for 15 minutes, press and hold any button for 1 minute. Reconnect the power. If that doesn't fix it, the thermostat has failed and you need a new one. Most have backup batteries that can cause the issue you are seeing, but the manual doesn't mention anything about batteries in the base unit.
125V AC / 60 Hz
OUTDOOR DIGITAL BLOCK HEATER TIMER
052-8835-2
Instructions
Plug timer into grounded outlet
To Set the Current Time: Press the HOUR button as many times as necessary to advance the display the correct time. Note, the time can only be set in 30 minute intervals. The LED display will display the hour (1-12) and on the half hour a light will illuminate in the upper right corner, next to the number 30. To change from AM to PM toggle 24 times, a dot will illuminate in the lower right corner of the display next to the letters PM.
To Program the Timer: Press the PROGRAM button once, the letter P will flash. Press the HOUR button to set the ON time. Press the HOUR button to set the ON time. Press the PROGRAM button again, the letter E will flash. Press the HOUR button to set the OFF time. Press the PROGRAM button to exit program setting mode. Press the HOUR button to review the ON/OFF setting.
To Connect/Operate the Timer: Plug device in to the timer and turn the device on.
To Revise the ON/OFF Setting: Unplug the timer and plug it back in. Repeat the programming steps above.
To Override the Timer: Press the PROGRAM button if you want the device to turn on before the preset time, but note the device will turn off at the preset time. For example, if the preset ON/OFF period is 3 pm - 4 pm, users can manually press PROGRAM to turn the device on at 2 PM, the timer will keep running until the preset off time at 4 pm.
Suitable for use with outdoor appliances. Raintight when mounted vertically with the receptacle facing downward. Use a three-conductor GFCI protected outlet. Do not immerse in water. DO NOT EXCEED RATED CAPACITY. Not for permanent installation. Do not install or use this product for more than a 90-day period per year.