Results for "humming noise"

Walked out to my RV this morning trying to decide between calling a repair tech or troubleshooting my Dometic Brisk Air rooftop AC myself since it's showing weird operational issues. The compressor engages and fan motor operates normally, but the unit fails to produce cold air output. Temperature differential across the evaporator coil is minimal.

Unit functioned properly through previous cooling season with no apparent issues. Current symptoms include normal airflow volume but inadequate cooling capacity. What systematic diagnostic procedure should I follow to identify the root cause? Looking for a methodical troubleshooting sequence that addresses the most probable failure points in order of likelihood. …more

Planning to use the same motor running trick that saved my old Winnebago's slide out, but this new rig's slide won't budge at all. It extended just fine this morning, but now when I try to bring it back in, the motor sounds like it's working but the slide isn't budging at all. I can hear it running but zero movement.

I'm trying to figure out if this is a hydraulic problem or if I've got a cable system that's gone haywire. Could it be something simple like low fluid, or am I looking at broken cables? Don't want to mess around with it too much without knowing what I'm dealing with first. …more

Somewhere above my head, there's this loud, relentless humming grinding through the RV whenever I flip on the rooftop AC — compressor won't start but the fan spins fine.

I've been dealing with this for days now and it's driving me crazy - especially with the heat we've been having! The humming is so loud that I'm worried something might be seriously damaged. I really hope this is something I can fix myself rather than having to call out a repair tech. What could be causing a compressor to hum loudly but not start up? …more

The freezer in my 2024 Jayco Eagle's Everchill 12V fridge works perfectly, but I'm tackling the non-cooling fridge section this Saturday — what should I check first? The Everchill 12V four-door refrigerator/freezer unit has developed what seems to be a common problem - the freezer compartment is working perfectly and maintaining proper temperatures, but the refrigerator section has completely stopped cooling.

I've verified that the internal fan is running normally, so it's not a power issue. The unit gets power, the controls light up, and I can hear it cycling on and off as expected. However, despite the fan running and the freezer working fine, the fridge compartment just won't get cold anymore. This seems like it happened suddenly rather than gradually losing cooling capacity.

I've read online that this is a known issue with these Everchill units, but I'm not sure what specifically causes the freezer to work while the fridge fails. What are the most likely culprits when you have this exact symptom pattern, and what should I check first to diagnose whether it's something I can fix myself or if I need to call for warranty service? …more

I tried everything I could think of, but probably a dumb question—why would my 2006 Sightseer 30B's AC hum after storage but blow zero air? big mistake lol. The thing is humming like crazy but zero air coming out of any vents. It's loud enough to wake the neighbors but doing absolutely nothing.

I'm guessing something got stuck or seized up while it was sitting? Anyone know what typically causes this after long storage periods? Really hoping it's something I can fix myself before calling a repair guy. …more

Our 2013 Phaeton's Coleman AC remote sensor is throwing wrong resistance readings and I've got my multimeter ready to fix this myself — just need the correct values to check against. The remote temp sensor in my living area started reading 99°F constantly, so I checked the resistance and found it was only 9kohms while the working sensor reads 90kohms at 82°F.

I ordered the replacement part 8330-3101 (which supposedly replaces my old 8330-309), but I'm worried because the new sensor ALSO measures 9kohms right out of the package - exactly like my "bad" one. I've tested both thermostats and they work fine when I swap the sensor leads.

I'm hesitant to install this new sensor since the resistance seems wrong. Could I damage my thermostat or AC system if there's a compatibility issue? Should I be measuring resistance differently, or is there a wiring problem I'm missing? I don't want to make things worse by installing the wrong part. …more

Every time we get heavy rain like those three days last week, my HWH Spacemaker hydraulic slide system motor runs but won't extend the slide out. The motor runs when I hit the extend button, but the slide absolutely will not move out. Everything else works perfectly - rear slide operates fine, leveling system works great, no blown fuses anywhere.

I've tested the extend solenoid and it's getting power, did an ohm test which showed 1.2 and open (which appears acceptable per the manual). I've already checked the converter box and solenoids and they look good. The safety locks are fully retracted so that shouldn't be the issue. I can hear the motor operating but there's zero movement on the slide itself.

I'm really hoping someone can point me in the right direction here. What are the most common causes when the motor runs but nothing happens? Should I be focusing on hydraulic leaks or is this still likely a solenoid problem even though it tested okay? …more

Starting to wonder if my 8-year-old rooftop heat pump that's cycling on and off constantly is worth repairing or if I should just replace the damn thing? It kicks on for literally one second, then shuts right back off. This just started happening yesterday.

What are the most common causes when a heat pump does this immediate on/off cycle? Need to know what to check first before calling a tech. …more

This compressor clutch for my Jayco Greyhawk E450's intermittent AC is going to cost me big — but am I even diagnosing the right part? The problem is specifically with the cooling function - the AC will blow ice cold air for about a minute or two, then the cooling suddenly stops even though the fan continues to run perfectly at all speed settings. After a few minutes, the cooling kicks back in again, then cycles off once more. This pattern repeats constantly while driving.

I've noticed that the fan motor and all the controls are working flawlessly - I can adjust from low to high speed without any issues. It's purely the cooling/compressor function that's acting up. The system isn't completely dead, which makes this even more puzzling. I suspect this might be related to the compressor clutch since the cooling cuts out so abruptly while the fan keeps running normally.

What should I be checking to diagnose this intermittent compressor clutch behavior? I want to understand the most likely causes and the proper diagnostic steps before taking it to a shop, since intermittent problems can be tricky for mechanics to reproduce and fix. …more

Looked everywhere online but still trying to decide between a fuel pump issue or ECM problem for my 1989 Ford Tioga 460 EFI that won't start after jumping the dead battery. The RV ran smoothly for weeks until I had to jump-start it after leaving lights on overnight. After the jump, the engine fired but immediately died - completely different behavior than its previous reliable starts.

The engine will only stay running when fuel is manually added to the intake, suggesting a fuel delivery problem. Prior to this incident, the fuel system worked flawlessly. The timing correlation between the dead battery jump-start and the fuel system failure seems significant.

What are the most likely causes when a 460 EFI system loses fuel delivery immediately after a battery jump? Could the jump-start procedure have damaged fuel system components, and what should I check first in the fuel pressure circuit? …more

Nobody wants to deal with electrical problems on a long camping trip, but here I am trying to figure out what's wrong with my setup. The TV and two nearby outlets suddenly stopped working on our extended northern trip, even though I tested everything before departure. These outlets only work when I manually turn on my Magnum Dimensions CSW1012 inverter, despite being plugged into 50-amp shore power most of the time. I'm trying to decide between two possibilities: either my inverter is failing (it's started making intermittent high-pitched humming sounds) or the transfer switch (CSW-TS15-H) isn't automatically switching properly. Should I be running the inverter while on shore power anyway? And what's the best way to diagnose whether this is an inverter problem or a transfer switch issue? …more