# Ender 5 Pro Firmware builder thermistor problems
**URL:** https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334
**Category:** Firmware Builder
**Created:** [26 October 2021 21:48 UTC](https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334 "2021-10-26T21:48:50Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@lsnadon](https://marlin.crc.id.au/forum/u/lsnadon)
#### Post date: [26 October 2021 21:48 UTC](https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334/1 "2021-10-26T21:48:50Z")
Using the Firmware Builder, I have an Ender 5 Pro with a MicroSwiss hotend and extruder, no other mods. Hoping to flash the printer to a Marlin firmware - using the builder, I get an error about the hotbed it will only heat to 60 degrees. I may be selecting the wrong thermistor for the hotbed, but I am using what others have specified in the configuration.h file, which is 1 (an Epcos 100k 4.7 pullup). Everything else does seem to work, but I cannot print because I get an error about the hotbed temp everytime.
---
### Author:  [@lsnadon](https://marlin.crc.id.au/forum/u/lsnadon)
#### Post date: [29 October 2021 00:27 UTC](https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334/2 "2021-10-29T00:27:11Z")
I am pretty sure I figured it out. If I do not check “Enable Bed PID Support”, a functioning firmware is generated and all is good.
With Bed PID suport enabled, running an M301 generates an error of “Bad Temperature ID” on my machine. I am not knowledgeable enough at this point to tell if it is an issue with my bed thermistor or the firmware that is generated. All I know, I got it working right now, so I am happy!!
Z-Probe Offset Wizard
Babysteps
Power Loss Recovery
…and really nice print jobs.
---
### Author:  [@CRCinAU](https://marlin.crc.id.au/forum/u/CRCinAU)
#### Post date: [29 October 2021 02:27 UTC](https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334/3 "2021-10-29T02:27:49Z")
As a pointer, you probably needed to do a PID Tune on the hotend and the bed… Likely that would have fixed the problem and allowed you to keep the PID function - which is much better for maintaining temperatures.
---
### Author:  [@lsnadon](https://marlin.crc.id.au/forum/u/lsnadon)
#### Post date: [29 October 2021 14:35 UTC](https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334/4 "2021-10-29T14:35:46Z")
I did PID tune the hot end just fine. The bed failed. As soon as the M301 command was entered for the bed, an immediate reply that the thermistor was bad. I am going to get a new bed heater and go from there…
---
### Author:  [@lsnadon](https://marlin.crc.id.au/forum/u/lsnadon)
#### Post date: [4 November 2021 01:24 UTC](https://marlin.crc.id.au/forum/t/ender-5-pro-firmware-builder-thermistor-problems/334/5 "2021-11-04T01:24:00Z")
Figured it out. I was getting errors because I had the Octoprint Temperature Fix plugin loaded. As soon as I deleted that plugin, no more errors.