Why is my car heater making a clicking noise?

Baseboard heaters sometimes make clicking sounds. These are caused by the unit’s metal reacting to temperature variations: it expands when the heat turns on and contracts when the temperature cools. This will leave room for the metal to expand without making noise.

Why do I get a clicking noise from my heater?

Hi Guys, first post and looking for a little help. I started getting a clicking noise every couple of seconds from the heater-a/c area and when the fan is on the high speed no matter what position is selected (vent/defrost) the recirculation door will open for a few seconds, it will just keep cycling like this.

Where does the lifter sound come from on a Chevy Silverado?

You can hear lifter click best around the top of the engine, and isolate the noise with a stethoscope against the valve cover. It will occur at idle and increases as you rev the engine, continuing even when the engine is warm. Valve lifter noise is detrimental and should be addressed quickly.

What makes a Chevy Silverado make a knocking noise?

For the first 30 to 60 seconds after a cold start, the short-skirted pistons rock inside the cylinders and slap against the cylinder walls, sounding rather like a diesel engine. The knocking can be heard around the top of the engine, but is much louder if you listen in the front wheel wells or beneath the truck.

Why is my HVAC not working on my Chevy Silverado?

Pull and reinsert the fuses for the HVAC before starting the truck. If this didn’t work for you try Step 2. If it seems like one side is stuck at one temperature only, it could mean the blend door actuator is no longer working. The actuator turns a door to switch between warm and cold air, but there are multiple actuators in your truck.

Why does my truck heater make a thumping noise?

Heater works fine otherwise. When I shut the truck down, the “thumping” cycle repeats, again, for 15 to 20 seconds. It does this all the time, even with the Heat or AC in the off position. While it is thumping, I can feel under the blower motor something striking something.

Why does my 94 siverado make a thumping noise?

Every time I start my 94 Siverado, for 15 to 20 seconds it makes a “thump, thump, thump…” sound from the front heater box, then it stops. Heater works fine otherwise. When I shut the truck down, the “thumping” cycle repeats, again, for 15 to 20 seconds.

Why do I hear a clicking sound from my heater?

What’s happening is the heater controls are run by little electric motors that open and close vent doors. When these little motors reach their limit as far as opening, or closing these doors, the “ratchet” on a limit spring so the motor won’t burn up.

What’s the clicking sound on a GM Truck?

When I have heter on and it is clicking, if I push the REC button it stops, but in that position, if I turn the heater/fan off the clicking starts again for the 30 sec.? Anyone have any imput on this. Thank you in advance …….Sherrie