It could be the low gas pressure. Especially if your water heater or gas dryer is kicking on at the same time. That is what I'm thinking on mine now.
Thanks for this information. My upstairs unit has a drain that runs across about 10 feet of attic space. Well it froze and the heater wouldn’t run starting about 3:30 yesterday. Based on your post, I installed a temporary bypass and the heater has been working. I had no idea a gas furnace generated this much condensation. This is about 17 hours worth, maybe 2 gallons of water.
Any suggestions for a permanent fix?
Any suggestions for a permanent fix?
This was a great suggestion. I drank some and didn't care what froze after that.
glad to see your going even if you have to dump the bucket every so often. I’m most cases You can insulate the exposed section and be ok. As long as it flows well there should be enough heat to keep from freezing. Home Depot should have insulation or LOCKE SUPPLY will have armaflex. The thicker wall the better. In some cases you might need to install heat trace tape but that would be rare
Supposed to run thru a “running trap “ and have that vertical piece directly after. It’s purpose is so that the leaving water does not pull the water out of the trap
In lieu of a trap you can also loop poly tube as long as you have enough head
one thing some installers and inspectors miss is having too much exhaust pipe (especially horizontal) and not account for the moisture condensing and flooding the unit in big (almost tidal wave like motion) swoosh.
Mine has pipe insulation sleeves around all the piping, indoor and outside. And have the heat trace tape wrapped around the pipes under the insulation. Still didn't match this cold. I wonder, seriously, about having the heat tape "through" the internal bore of the pipes?
Is the heat tape working? Is it thermostatically controlled?
Yep, warm to the touch.
Just not warm enough to unfreeze all that water in the pipe.
Dave
Maybe an obvious question.... is the heat tape on top of the pipe? It must be on the bottom
Not 100% sure.
Looks like it spirals around the pipe but can't tell as the pipe is fully covered in insulation sleeves and the tape is underneath the insulation.
Dave
