# Temp only heats to 25°

**URL:** <https://forum.sovol3d.com/t/temp-only-heats-to-25/8736>\
**Category:** Sovol SV03 BIG DD 3D printer\
**Created:** [September 15, 2025, 2:12pm UTC](https://forum.sovol3d.com/t/temp-only-heats-to-25/8736 "2025-09-15T14:12:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Endur](https://avatars.discourse-cdn.com/v4/letter/e/7feea3/32.png) [@Endur](https://forum.sovol3d.com/u/Endur)\
**Post date:** [September 15, 2025, 2:12pm UTC](https://forum.sovol3d.com/t/temp-only-heats-to-25/8736/1 "2025-09-15T14:12:16Z")

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I have a problem. At first, I had a thermal runaway problem. I replaced both thermistor for the bed and nozzle, and nozzle heats up fine, but now my beds temperature only stays at 25° and when I start to heat it , I get heating failed: bed

 ![20250913_192328](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/1/1041120759f3a780a367eb764a35b4b8c89b4aba.jpeg)

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**Author:** ![mich0111](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/mich0111/32/1176_2.png) [@mich0111](https://forum.sovol3d.com/u/mich0111)\
**Post date:** [September 15, 2025, 5:38pm UTC](https://forum.sovol3d.com/t/temp-only-heats-to-25/8736/2 "2025-09-15T17:38:49Z")

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Hi,

Have you tested the heated bed radiator?

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**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\
**Post date:** [September 16, 2025, 4:15pm UTC](https://forum.sovol3d.com/t/temp-only-heats-to-25/8736/3 "2025-09-16T16:15:13Z")

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Did you get the bed thermistor TIGHT against the bed with insulation over the top? If the thermistor doesn’t respond quickly enough when the heater turns on an error results.