Bobcat 753 warning code HF1-6

[robertpier]

I'm getting a warning code with an alarm when I start my Bobcat 753. The display reads HF1-6. The book says it's "No sensor signal". What does this mean? Have I possibly damaged something by operating it after getting this message? I thought it might be due to the hydraulic fluid being on the low end. Adding fluid to bring it up to the middle of the dipstick range has not eliminated the warning upon startup. Could it be due to the cold temps? It seems every time I need it lately, it's been very cold here in Minnesota. Thanks in advance for any info.

 

[OldMachinist]

Could be a broken wire to the sensor, bad sensor or the conector is off. The sensor is on the hydraulic filter mounting block.

 

[robertpier]

Thanks for your reply but there must be something else going on. Now that the temps aren't in the sub zero range, I don't get the warning code at startup. You would think that a broken wire or bad sensor would fail regardless of the temp. Thanks for your input anyway.