DeMers Automotive
1533 N Main St | Longmont, Colorado 80501

Engine and Exhaust

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Thermostat

{{ image('MzU0') }} The thermostat is part of your cooling system. Longmont residents' vehicle thermostats perform a similar function to the thermostats in their homes. At home, you set you...
Published on: Sep 14, 2025

How Cool is That! (Coolant level sensor replacement)

Your vehicle’s engine runs hot.  It should, since it’s a series of little explosions that create the power that gets you going where you want to go.  To keep the engine cool, eng...
Published on: Sep 07, 2025

Air Blend Box

You push a few buttons or turn some knobs, and voila! You have air blowing on your feet or cool air chilling your face. But how does all that happen? Well, it's all thanks to ...
Published on: Dec 01, 2024

DeMers Automotive Advice on Your Cooling System

Last week I was out running errands and my temperature warning light came on – total panic!  I pulled over and my car was overheating After it cooled down, I went right in to my service ce...
Published on: Mar 18, 2024

DeMers Automotive Tech Question On Your Cooling System

Question I was driving down the freeway and smoke started coming out of my car.  I pulled over and called my husband.  I had to be towed to my mechanic.  He said my car had overheated....
Published on: Jan 01, 2024

Cooling System Service At DeMers Automotive

{{ image('MzA1') }} Last week I was out running errands in Longmont and my temperature warning light came on – total panic! I pulled over and my car was overheating.After it cooled do...
Published on: Oct 24, 2021

Simple Answers from DeMers Automotive for Longmont: Cooling System

Question My engine never overheats.  Why should I get a cooling system service? Answer That’s a good question to ask, because if you don’t have the full answer you may end up in tr...
Published on: Aug 23, 2021

The Hot Switch (Coolant Vacuum Valve Switch)

When the weather gets cooler, you want the cabin of your vehicle to stay warm.  When you switch on the heat, you may find the air that comes out of the vents just isn't hot.  The problem co...
Published on: Dec 30, 2019