In the upper Midwest, the leaves on the trees are turning beautiful colors, the morning air has a little “chill” to it, and people are starting to turn on their heating systems, both commercially and residentially.
Now comes the time to get our mindset off of air conditioning and start thinking about heating, ignition controls, diagnostics and servicing.
We need to remember how to measure manifold pressures on the gas valve. We need to remember how to measure microamps and what is the correct reading for that heating control. We need to remember how to measure “temperature rise” through the furnace. And, we need to remember how to measure the pressure drop through the furnace.
So why are these 4 items above so important to servicing heating? Simply put — these are the basic diagnostic items that will help you solve most heating problems.
In my next few posts, we’ll look at these items and go into detail on how to perform the check and what they tell you about the system. So stay tuned.