A homeowner turned to Reddit after dealing with a frustrating pattern: Their heat pump kept shutting off during hot nights, even after multiple HVAC technicians concluded that nothing was wrong.
What happened?
In a post on Reddit's r/hvacadvice, the homeowner explained that the unit was not completely out of commission, but the issue was disruptive enough that indoor temperatures reached 80 degrees. The original poster said they switched off the heat pump's condensate sensor in an attempt to fix the problem. Unfortunately, that created an ongoing drainage-related problem.
"Of course that flooded under the unit. Called HVAC company out 2 different years and they say nothing is wrong with unit," the poster wrote. "Told me how to blow it out. Told me to keep tablets in it. We do all that. It still has an issue draining, apparently."
"Does it need a vent? Is the angle bad??" they wondered.
Why does it matter?
A heat pump that repeatedly trips a sensor can mean more than one uncomfortable night. If condensate is not draining properly, it can lead to shutdowns, weaker cooling performance, and even flooding — exactly what the poster said happened after removing the sensor out of desperation.
Still, heat pumps can be significantly more energy-efficient than traditional HVAC systems while providing both heating and cooling from one setup.
That can translate to lower utility bills over time, and many homeowners may also qualify for tax credits and rebates, making upgrades more affordable. EnergySage's Heat Pump Marketplace can help people compare heat pump options and potential savings.
For those who do not need a whole-home replacement and want more targeted comfort, Merino offers single-room, ultra-efficient HVAC systems at a lower price point.
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What can I do?
Preventative maintenance can save money by cutting down on repeat service calls, preventing water damage, and helping a heat pump operate as efficiently as possible.
If a system is older or continues acting up, comparing replacement options through tools like EnergySage's Heat Pump Marketplace may be worthwhile, especially when incentives can help offset upfront costs. Homeowners looking to cut energy bills further can also explore solar. EnergySage offers a free solar quotes comparison tool.
As for this homeowner, Reddit users offered several troubleshooting suggestions.
"It's piped wrong that's why blowing it out doesn't solve the issue," one advised.
"Should have a vent after the trap. Maybe the trap isn't deep enough if you have a draw thru coil," another recommended.
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