Filter beeping and repl batt

Did you have any codes in the airbag control module? Why did you replace so many components? Prior to replacing all these components, did you perform any type of electrical tests (resistance/open) to verify that they were good or bad?
If you are not familiar with automotive electrical systems and diagnosis, best you take it to a location that does.
Working with the airbag circuit is very dangerou !

Do you mean the alert flag (a triangle with an exclamation inside it) or a different symbol? The Alert flag will appear with another message on the screen. If it is time to replace the battery, you'll also see "BATT" to the left of the flag and a low battery icon somewhere along the top of the LCD screen. If the thermostat is set to alert you to change the HVAC system filter regularly, you'll see "REPL" to the left of the alert flag.

This is from the T4 Pro thermostat manual on pages 6 and 7. See https://forwardthinking.honeywellhome.com/assets/tseries/resources/install/T4%20Pro%20User%20Guide%20-%2033-00188EFS.pdf . The T6 Pro uses the same alert behavior.

I hope this helps.

Cindy Wells

Was oil filter changed as well ? This may result in low oil pressure shutdown until filter is filled with oil. Is there a sump oil level sensor that has stuck when oil was drained and now causing a no oil shutdown ? The battery indicator may not be real if the battery is ok.

Need to know exact patterns of beep. The beeps are a code that will tell us what is wrong with the computer. You can also do a search for beep codes. This should provide you with multiple links for this issue. Count the beeps and look at the page with the codes on it. It will tell you if you are having a memory issue (came loose when you put the battery in), or if you have fried the board by not using proper static protection.

Hello,
Please see this as reference

Continuous long beeps-RAM error
2 short beeps- BIOS error
1 long and 8 short beeps- Display Card error
1 long beep after few seconds 2 short beeps-FDC error
1 long beep after few seconds 1 short beeps-FDC is Ok
1 long beep and 2 short beeps-Display Card Error

Most probable cause is Ram memory, please try removing modules and reinserting, also try using alternately just one of them to determine which one is defective.

Try autozone, advance auto parts, or Pep Boys or the dealer for the replacement battery cables.

check the battery inside if drain / wornout...replacing battery will fixed your problem..

remove the battery and check the voltage...standard UPS batt is 12volts
or check to the nearest electronic shop to test the batt.

the batt is used for backup. Its beeping to get you to install a batt

when i have seen this in the past, i have been able to clean the contacts that the batteries touch.they may not look dirty, but if they get a little corrosion or get tarnished, they will not let the full battery power get to the stat and it will think the battery is low. try cleaning it with some emery cloth and see if that helps.

The device does not contain a user repl battery.The batt is rechargable and is recommended that you charge it nightly.It uses an internal lihtium ion batt.They say contact cust care due to fluid that may leak from the internal batt can result in injury to skin and eyes?? Theysay cust care for assis if you need repl batt.http://www.wirefly.c...