https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E195-error-no-power-to-R-wire-all-of-a-sudden/m-p/789137#M143350 <P><a href="https://www.googlenestcommunity.com/t5/user/viewprofilepage/user-id/852820">@Elleclouds</a>&nbsp;</P> <P>Check the fuse on the control board in the furnace/air handler</P> <P>&nbsp;</P> Thu, 05 Feb 2026 07:55:26 GMT Patrick_Caezza 2026-02-05T07:55:26Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E195-error-no-power-to-R-wire-all-of-a-sudden/m-p/788693#M143310 <P>I ran my heat the day before yesterday for the first time probably ever. &nbsp;Yesterday I went to run it again and got an E195 error saying no power to Red wire. &nbsp;I check the condensation safety trip, it was bone dry, the water pan was bone dry. &nbsp;I did vacuum out alot of black gunk from the line till it was clear but there was still not success. &nbsp;Today I will check the fuse, but my HVAC system is in the attic and I wanted to see if there was anything else I could try to fix this error?</P> Tue, 03 Feb 2026 15:09:38 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E195-error-no-power-to-R-wire-all-of-a-sudden/m-p/788693#M143310 Elleclouds 2026-02-03T15:09:38Z https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E195-error-no-power-to-R-wire-all-of-a-sudden/m-p/789137#M143350 <P><a href="https://www.googlenestcommunity.com/t5/user/viewprofilepage/user-id/852820">@Elleclouds</a>&nbsp;</P> <P>Check the fuse on the control board in the furnace/air handler</P> <P>&nbsp;</P> Thu, 05 Feb 2026 07:55:26 GMT https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-E195-error-no-power-to-R-wire-all-of-a-sudden/m-p/789137#M143350 Patrick_Caezza 2026-02-05T07:55:26Z