New HVAC unit won't heat and makes clicking sounds
Brand new heating systems often fail on the first cold day because they were never tested upon installation. Trying to troubleshoot the clicking and gurgling noises yourself risks voiding your warranty, but calling a technician right away prevents you from freezing in a 50-degree house.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Asking AI or Reddit for troubleshooting and wiring instructions
- 2Attempting DIY rewiring and thermostat reconfiguration
- 3Waiting until morning to contact the original installer
- 4Manually draining the inducer assembly
- 5Clearing clogged condensate traps and lines
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“When I turn my thermostat on it clicks and there’s a gurgling sound then the sound stops. The heat never comes on. Any ideas on a DIY fix?”source ↗
“I'm asking here to see if it's something quick I can fix. The house is at ~ 50⁰F”source ↗
Where this came up
People with this problem also raised
- 2Can you service an HVAC system with leak seal in it?
- 17What to do when an HVAC installation fails inspection
- 11Why does my brand new AC not cool as well as the old one?
- 4Will servicing an old HVAC unit break it?
- 3Why does my thermostat keep losing power and resetting?
- 3Mini-split can't keep house warm when it freezes outside