Fog in the walk-in freezer

[fool4school]

Ok.. First post I have done so here it is.
I have a walk-in freezer that has frost building up ice on the roof of the box. Also it is blowing fog all threw the box. The box stays @ -15 Degrees but, I cant figure out where the fog is coming from. The door has a new door seal on it and it has a small gap in the corner of the frame. Both door frame heaters are working but, that is the only air leak I see...
I have 4 stages of defrost for 45 min. each also. Looking for some opinons and thoughts
Thanks

[targetman]

Could be staying in defrost too long.

[pairman]

1 air leak is 1 too many. It brings in warm, moist air and wastes energy. 45 minutes on defrost is too long. Warms up too much and then when it kicks on it refreezes on the ceiling. The defrost timer is a backup if the defrost termination sensor goes bad. Check that out on the evaporator coil and make sure it has a connection to the X terminal on the defrost timer.

[amarzec]

What's your evaporator TD? Sounds like hoarfrost to me.



Pairman~ I'm from Jackson, Michigan. I used to work for Apsen Heating and Cooling. I had an internship there last summer.

[itsamine]

Sounds like an air leak but I would also check the fan delay.

[sprmktrefertech]

Here's a great pdf on iced up evaps caused by fan/delay/term. stat def.problems....

[rayr]

All the above and make sure the condensate line has a trap on it. (Outside the freezer)

[fool4school]

Thanks for the PFD it is good info Attached Files Evap_Icing_HTPG_2010-01-25.pdf (927
WHat is the best way to adjust a door gasket ?? I already have a new on in place but it is alowing alot of air threw the door jamb?

[the mojo]

Thanks for the PFD it is good info Attached Files Evap_Icing_HTPG_2010-01-25.pdf (927
WHat is the best way to adjust a door gasket ?? I already have a new on in place but it is alowing alot of air threw the door jamb?

A Dollar bill, but it works better if you use a $20 spot.

[stevrock]

All the above and make sure the condensate line has a trap on it. (Outside the freezer)

My bet if you can't see a gap.

Otherwise, grab your caulk and get your fingers working.