Any HVAC guys here?

replace the blower motor first. if that doesnt do it, it is probably something on the board.

Could be the capacitor for the blower. Turn the system off find the brown wires on the fan. They should go to a little oval shaped can. That’s your capacitor. Remove your leads put a multi meter on Mf place your probes on the spades and measure your capacity. Should be no more than %10 of the rating. It could be anything from 3-7.5Mf

Last Edited by The looser on 11/13/2020 11:43 AM

Good advice, capacitors are usually the culprit.

I was just about to say it's probably the flux capacitor.

Thanks for the replies.

I'll run these suggestions by my tech today.

To the one star bandit: eat my shorts

The blower typically won’t start until a thermostat that’s usually mounted inside of the blower section warms up enough, making the switch to energize the blower relay.




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relay

Half these guys...

Take your model number of the furnace and with the symptoms do some searches.

You will TYPICALLY find some decent model/design specific troubleshooting postings.

NEVER just start replacing parts.

90% of the fixing problem is finding out exactly what the problem is.

Vast majority of time, it will be your CONTROL BOARD.

If it is intermitent, it is probably something like a bad set of points...

Or... Solder breaks from thermal stress.

Examining the performance of your system, by cranking up the thermostat setting and creating a NEED for heat, will let you examine what is going on.

If it is bad points/solder joint should have a meaningful noise.

Do you have a multi-meter (10 bucks at a place like Walmart etc), you should be able to find the problem.

An easy way to test your motor is to by-pass the control board, etc.

Get some geography lessons from the MSGBOARDS that deal with your TYPE of system.

It is usually just a few bucks to fix the problem.

BTW, that TECH that charged 175 for NOTHING is an idiot.

ALL technicians should be able to figure out the problem... IN MINUTES... NO MATTER WHAT!

If this is above your head, hit me back and I'll walk you thru step by step.

A freaking Chimpanzee CAN FIX YOUR SYSTEM.

What a bunch of DUMBASS POSEURS on GLP.

How do you IDIOTS make it thru the day.

It is EMBARASSING.

As long as you don't mind bumping your head on the glass ceiling, this is kids stuff.

Anybody can fix anything...

You just got to have 1.5 working brain cells.

Last Edited by golemina on 11/13/2020 12:54 PM

Easy to check the motor.
Replace thermocouple. If that doesn't work you have a bad valve. Shop around 1/3 price online.

Bullshit.

You find the problem.

You DON'T just replace parts.

Just need to determine the type of motor. If it's a 110 volt type, you can just apply power directly to the motor.

If it is a low-voltage system, you can just jump it from the low voltage side of the system.

Main tool is eyes and A BRIAN.

Motors RARELY go out.

9/10 it is a relay, control board issue, or dead battery on the thermostat.

You walk it thru starting at the temperature setting device.

That is why a guy that doesn't do this regularly should get some geography lessons by taking the HVAC system name and model and symptoms and SEARCH.

Get an infusion of that INSTANT EXPERTISE, even people with only 1.5 brain cells, you get from watching videos on YT.

Monkey see. Monkey do.

LOL!!!

You're TROLLING right?

Bad fan switch? Tech should have checked but who knows these days.

We will make the assumption you have a modern furnace with digital components. If not, tell us as that opens up a different can worms.

IF your furnace has a control board, there will be a green LED somewhere on it that may flash a code for a fault. Unless it is a control board issue, then there are no fault codes for that. The LED just stays green showing that power is on.

Your motor may or may not have a capacitor, they are cheap regard less and any decent HVAC wholesaler has them for under $15. Look at the old one, if it is bulging or broken open, replace it.

The high temp relay is a good idea. These are a mechanical device and can wear out over time.

The thermostat is the place to start. Change the batteries, if there are any. Short cycling of A/C is usually an indicator of a bad thermostat. Not really a problem in heating mode as different relays are in play.

If your tech is stumped, get a different company. You're paying someone journeyman's wages and getting an apprentice. You furnace is not a training ground. Hire competent people.