Air Exchange Freezing Up - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 01-18-2011, 03:06 PM   #1
Member
 
Join Date: Dec 2009
Location: NW Minnesota
Posts: 109
Rewards Points: 75
Default

Air exchange freezing up


I have a Venmar Constructo 1.5 air exchange unit. We have 100% electric heat, so there is no furnace hooked up to this.

The fresh air duct from outside (before it gets to the unit) is about solid ice. It is insulated round tubing style duct.

The unit itself seems to be working fine, as our humidity stays lows (no buildup on windows, etc.) The problem is now the ice buildup has started on the outgoing end as well (to house post system). I think all the ice build up is making the unit heavier and out of level, so some of the water from the defrost cycle leaks out in different areas, instead of the through the drain hoses. Not to mention once the weather warms up, the duct will drip everywhere (this past spring I had to poke holes in the duct to drain it, as it had a huge bulge of water).

The co. that put it in has come out twice. The first time they said the unit wasn't balanced, so that created the buildup. The second time they said the incoming vent was taking on snow, as it was to the north, where we get most of our wind, etc. So they changed the location of the vent to the side of the house.

Well, it is still freezing up.

Is this normal? The defrost cycle comes on 4-5 times an hour.

I have a feeling the incoming cold air is limited as it tries to enter the unit, then "sits" in the duct and freezes.

They are coming out again in a couple of days to look at it.

I would appreciate a couple of ideas as what to ask the tech. on why this is happening. I suspect they do not know.

Anyway, thanks in advance for any advice.

Advertisement

Bill7 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
fridge not freezing vonross Appliances 7 05-22-2010 10:26 PM
Condenser freezing zep HVAC 2 01-30-2010 09:04 PM
freezing pipes / bad insulation plumber red Plumbing 10 01-30-2010 06:46 PM
How to keep attic pipes from freezing in winter with gable vents ErikKratz HVAC 7 07-11-2008 10:32 PM
Doors freezing shut timp Automotive Repairs 10 01-18-2008 05:40 AM




Top of Page | View New Posts