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January 11th, 2017, 4:28 pm
* Abilene ** Abilene *
  • Joined: November 25th, 2016, 5:43 pm
  • Posts: 6

I've had my 640 since November and just installed the thermal blanket. I've noticed since the thermal blanket has been installed my 640 is overshooting the startup temp by 50 - 70 degrees on startup. Also, it takes a considerable amount of time for the temp to decrease closer to my set temp. It doesn't seem to ever hit the set temp, it may get within 10 - 15 degrees high or low.

My software load is U29 and the unit was manufactured in November 2016.

Any feedback would be appreciated.

January 12th, 2017, 6:47 pm
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  • Joined: April 18th, 2014, 3:12 pm
  • Posts: 2036

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January 21st, 2017, 8:27 am
* Abilene ** Abilene *
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  • Joined: January 13th, 2015, 9:41 am
  • Posts: 48
  • Location: Arkansas

For the benefit of the community, what was the answer? Mine will usually overshoot by that amount on startup without a thermal blanket. I've always just considered it "normal".

January 21st, 2017, 10:26 am
* Kingman ** Kingman *
  • Joined: September 3rd, 2014, 11:04 pm
  • Posts: 374

It is normal IMHO. Always overshoots just like your oven, then drops below and then stays kinda close. It is a wood fire.

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