Lost remote how do I change thermostat setting button works for timer but not for thermostat

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Have you changed the battery?
usually the battery compartment (and the model number) on located on back of thermostat
Look up manual on internet

Gene
Water Heater Timers Save Money

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Yes. It appears the Sunvix SP2 is 2-channel timer.
http://www.sunvic.co.uk/documentation/Programmer_Select_207.pdf

Two-channel means CH central heat and WH water heater can be programmed separately, and each can have its own timing program.
pg 3

The timer offers pre-programmed options for both CH and WH, which can be used, or program your own schedule. chart pg 5 and steps pg 3

Limitations: both channels operate on same clock time, and dip switch setting. pg 6. So the WH cannot be programmed for 5-2 weekdays-weekends and CH programmed for 24 hour.
As a convenience for varied work schedules, Sometimes people use the 5-2 weekday-weekend option so 2 days of week can have different programming, and then fudge current day setting during the set-current-time step pg2 so the 'weekend days' are actually moved to wedsday-thursday instead of sat-sun.

Option: both CH and WH timer programs can be linked and follow same programming by using copy button. pg 5

Using advance button on either side of timer, pg 3-4, WH and CH timing schedules can be overridden temporarily until next set point is reached. Then regular programming automatically resumes.
If override or Advance button is pushed for either CH or WH, it reverses whatever programming is in effect. On becomes off, or off becomes on. However if CH thermostat is satisfied and room temperature has not fallen below thermostat set point, then override will not turn CH on, but override will turn CH off. Same for WH override: If cylinder thermostat is satisfied with internal water temperature, the water heater will not turn on and heat more water, but the override can turn water cylinder off.

Unit requires Cr2033 lithium button battery. Pg 6. Probably lasts 3-5 years. Programming is protected for 30 days from power outage.
If programming is lost, change battery, the reset timer and reprogram to restore functionality.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Hello
make a System Reset process. To do this;
If the TV will not respond to either the remote control or the front panel controls and/or will not power Off, press the SYSTEM RESET button with a pointed item like the end point of a paperclip. The TV will turn Off and the TIMER light will flash quickly for about one minute. When the TIMER light stops flashing, you may again turn on the TV. The changes you made the last time the TV was on before you used the SYSTEM RESET button may be lost, however, the changes that were previously saved are not lost.
OK.

Use the remote to enter the timer to switch off - OFF timer setting and the On timing after setting the clock on the remote
Once this is presetted the unit will continue to work shut of in the thermostat settings and fully cuts off power in the set off time.
later the set will come back in the set on time and work till the thermostat setting is reached.

To reset the lamp timer, hold the "enter" button on the tv and the "mute" button on the remote at the same time. Once the menu pops up, hit the right arrow on the remote and confirm the reset.


I would guess that's it's a little too late for this answer now, but for future reference... ;-)

My remote won't work. It will work once, maybe twice and then no response from it. New batteries, haven't dropped it, etc.. HELP !!

try holding the filter button in for three seconds, if that doesn't reset the timer try the filter button and the temp. up button at the same time for three seconds.

try repairhelper.com

The timer light blinks when the AC power has been disconnected and the clock is not set. This is how the set warns you that it can no longer do timer recordings. Setting the clock and doing an autoprogram will fix it, but both the remote and the remote receiver must be working. If the original remote is not damaged and has good batteries in it but does not work on that set and you cannot get any other universal remote to work, then the remote receiver (the IR "eye") inside the set has failed and needs to be replaced. I have seen many of those little receivers failing recently. If you do not have experience changing electronic parts on small PC boards then have a qualified tech change it for you.