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Ultimate HVAC Troubleshooting Cheat Sheet
10 of the Most Common HVAC Symptoms Cheat Sheet
HVAC Cheat Sheet Topics
- No Heating or Cooling
- Insufficient Heating or Cooling
- Poor Airflow
- High Energy Bills
- Frequent Cycling On and Off
- Bad Odor
- Unusual Noises
- Thermostat Issues
- Frozen Evaporator Coils
- Leaks or Moisture
Not Private Equity or Investor Owned
HVAC Troubleshooting Cheat Sheet
10 HVAC Symptoms and What Could be Wrong
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Our HVAC veterans went through the top 10 HVAC symptoms in order to build a HVAC troubleshooting cheat sheet – a homeowner or even technician could use. It gives the greater idea of what could be wrong with your HVAC system and where to begin when trying to remedy a problem. Let our heating and cooling pros come in when things become more complicated than changing a battery – and use our HVAC troubleshooting cheat sheet to see where we begin.
1. No Heating or Cooling
First on the HVAC troubleshooting cheat sheet is your system produces no hot or cold air.
- Check thermostat setting and batteries
- Power is correctly supplied to unit
- Check for blown fuses or tripped circuit breakers
- Inspect gas supply and line (gas furnace)
- Test ignition system issues and safety mechanisms (gas furnaces)
- Look at the compressor or capacitor (air conditioning)
- Verify unrestricted air flow and replace air filters
2. Insufficient Heating or Cooling
The heating or cooling is having a hard time keeping up with environment requirements.
- Clogged air filters
- Check refrigerant leaks and recharge refrigerant when needed (air conditioning)
- Clean or replace evaporator and condenser coils
- Check for correct insulation and duct sealing
- Verify enough airflow and adjust blower speed settings
- Install a zoning system that balances temperature in specific areas
3. Poor Airflow
Check the possible fixes required on the HVAC troubleshooting cheat sheet for not adequate airflow.
- Clean or replace dirty air filters
- Check for blockage in the air ducts or vents
- Seal leaks in ductwork
- Verify correct sizing and installation of ductwork
- Clean or replace the blower motor or fan
4. High Energy Bills
The bill is reaching absurd levels. It could be a simple air filter change and making things optimal or your space is poorly insulated.
- Air filters could need cleaned or replaced
- Leaks in ductwork going to vents
- Upgrade to a more energy efficient HVAC system like a heat pump
- Using a programmable thermostat
- Insulation added to exterior of home
- Regular maintenance making sure your unit runs efficiently
5. Frequent Turning On and Off
Why is the heater or air conditioning cycling on and off? The HVAC troubleshooting cheat sheet lists possible fixes.
- Thermostat settings and adjusting temperature differentials
- Replacing really dirty air filters
- Bad thermostat needing replaced
- Correct size of HVAC units in system
- Look for leaks in refrigerant and and needs recharge (air conditioning)
6. Bad Odors From HVAC
If there is a smell showing up when your system is running, there could be mildew or mold in the unit.
- Check air filter quality and replace
- Look for mold or mildew growth in units and ductwork
- Check for burnt wires and electronics
- Remove all debris or clutter from away system
- Look for signs of rodents and animals living in system
7. HVAC Making Noises
Moving parts willl ware and begin to make sounds. See what potentially could be the fix in the HVAC troubleshooting cheat sheet.
- Tighten or replace loose and worn belts
- Lubricate moving parts including bearings or motors
- Tighten or replace loose and worn fan blades
- Clean dirty fan blades and housing
- Replace old compressor components
8. Broken Thermostat
A broken thermostat is typically a quick visit by a HVAC technician.
- Replace batteries in thermostat
- Recalibrate and reset thermostats
- Check wiring for looseness or corrosion
9. Frozen Evaporator Coils
Notice ice or frost building on your unit? Excluding environmental affects, it could be a simple cleaning job or recharging the refrigerant levels. See some possibilities below.
- Check for restricted airflow and replace old filters
- Look for leak in refrigerant and recharge line
- Clean dirty coils that stops transfer of heat
- Issues with defrost cycle in heat pumps
- Proper operation of the blower motor
10. Leaks or Moisture in HVAC
Pooling water or water damage could be from a clogged line.
- Repair or replace damaged condensate drain lines
- Seal leaks in the refrigerant line and recharge line
- Clean and clear condensate drain pans
- Check for clogs in the condensate drain line
We Are Vice
Lindsey M.
23:14 30 Oct 25
Kodee was amazing and fixed my heater that I’ve been without for weeks. He was very professional and I would absolutely recommend him!
Jerry H.
23:15 07 Oct 25
Travis and Rasheed showed up on time and went to work replacing our indoor air handler and heating coils. Big job but they had us up and running by days end. We appreciate you!!
Ron S.
17:50 05 Oct 25
Vice has no control of their parts even though they are Dankin dealer. I was told it would take approx. 2 wks to get parts to fix our exterior air conditioning unit. It took just short of 2 mos. On multiple occasions they couldn't tell us where the parts were coming from or who we could contact to find out what was going on. We also had a full 12 yr replacement warranty and they wouldn't replace the unit either. Then I get a bill for $2,022 for the install and I was told it would take 2 hrs.
Update; I received a call from Bennie (Ops Mgr) at vice regarding our situation. He did the right thing and adjusted our bill. and apologized for our inconvenience.
Update; I received a call from Bennie (Ops Mgr) at vice regarding our situation. He did the right thing and adjusted our bill. and apologized for our inconvenience.
Nancy W.
16:48 12 Sep 25
Travis was on time, very professional, efficient, and got the job done! I'm very satisfied with Vice Heating and will be using them again and recommending them.
Timothy K.
17:07 09 Sep 25
Travis & Michael did an outstanding job of quickly and thoroughly diagnosing and repairing the HVAC unit in our IT closet. Nicely done, guys!
Candice A.
22:48 22 Jul 25
Drew was an excellent Service Technician. He was explanatory and thorough. Looking forward to the repair.
Martha G.
16:11 15 Jul 25
Michael, the technician was very courteous and knowledgeable. Explained everything on the repair, he conducted. Very polite. I’ll be calling you folks whenever I need a repair to my Furnace or air conditioner units. Thank you so much for your excellent service.
Andrea C.
19:11 19 May 25
Our technician was very prompt and professional. He answered our questions clearly and he did a good job. We were pleased with our service.
Michelle D.
19:46 21 Apr 25
Michael came out to fix the cooling in our newly installed Bosch mini split. Excellent technician with working knowledge of how the system should operate. Very professional and had it fixed in no time.
Nicole G.
15:13 28 Mar 25
Will came out to our home to repair our heat pump that was only 4 years old. It was installed by another central oregon company. But he found the issue quickly, was able to run it under warranty and only charged for labor costs. Very helpful and great customer service! Would definitely recommend!!
Linda B.
18:51 30 May 24
Professional and thorough from start to finish. Answered all my questions and then some. Educated me so I felt I made the right choice. The crew was respectful and cleaned up after themselves. Always on time. Responded to emails fast. Thank you to everyone at Vice for a pleasant experience.
Steve D.
04:34 30 May 24
On time. Responsive. Thorough
Mimi W.
22:44 17 May 24
Polite kind young men come to my home to put in a new heat pump. They were great, knowledgeable men. Answered all my questions, which happened through out the day. They did a wonderful job, kept work space as tidy as possible. I can’t say one bad thing about the men who came out to first instal the system.
The 2 men who came out today to replace the heat pump itself, because of a manufacturing defect were also kind and respectful.
I would recommend this company and these 4 men to anyone who asked and a new heat pump, very highly.
The only name of these men where Jefferson, good man.
The 2 men who came out today to replace the heat pump itself, because of a manufacturing defect were also kind and respectful.
I would recommend this company and these 4 men to anyone who asked and a new heat pump, very highly.
The only name of these men where Jefferson, good man.
greg G.
18:37 16 May 24
Danny B.
20:06 09 May 24
This is a great company!
Chris is a huge asset to this company
He came in and just got the job done.
The pricing was very Reasonable.
Definitely recommend if you’re looking to get your HVAC system fixed.
Chris is a huge asset to this company
He came in and just got the job done.
The pricing was very Reasonable.
Definitely recommend if you’re looking to get your HVAC system fixed.
Melissa L.
01:43 07 May 24
Dee Z.
19:49 06 May 24
John F.
00:20 04 May 24
Erica L.
12:46 02 May 24
Great experience working with this team. They were knowledgeable and friendly, the team arrived on time and the install was perfect! Highly recommend Vice Heating!.
Harlan F.
22:28 01 May 24
Chris was on time and took care of our semi annual maintenance in a timely manner.
Very nice and friendly.
Very nice and friendly.
Monica F.
15:16 22 Apr 24
Fred K.
16:15 17 Apr 24
Chris does a thorough job. Is professional, efficient, and polite during his visit. We had one small issue with a change to the thermostat which require his revisit to correct. All is well.
Joyce N.
18:54 03 Apr 24
GB P.
22:28 25 Mar 24
Great service, extremely helpful and professional.
Robert H.
21:03 18 Mar 24
Mike P.
03:11 07 Mar 24
Excellent!!
Jeremiah S.
15:56 13 Feb 24
Christy S.
02:22 22 Mar 22
Let me start by saying that the only reason I'm giving them 4 stars is because Zach is a ROCK STAR! If it weren't for him they would only have gotten 1 star.
So this has been our experience... We needed a new HVAC system installed.. We were told the workers would be here at 7am and that it would only take one day to complete the job. When 8 o'clock rolled around and none of their workers had shown up, we called and were told that the worker that was suppose to come had called in sick... Why weren't we notified??? I don't know. To their credit, instead of rescheduling they found workers to come out and start the job. Apparently this type of install is done in stages. Two of their workers came in and removed the old system and installed the new system... only they installed it upside-down. Shouldn't they know where the return air is suppose to come out of? When Zach got here to connect the unit, he and my husband realized the mistake. So Zach called the installers to come back and fix the issue only to have them argue with him. After some persuasion they finally came back and reinstalled it. It's been 12 hours, they still aren't done. Zach is still working hard trying to get us some heat...I appreciate him! I am however starting to freeze and really hoping he will be successful soon. I also hope Zack is rewarded for his hard work and dedication.
So this has been our experience... We needed a new HVAC system installed.. We were told the workers would be here at 7am and that it would only take one day to complete the job. When 8 o'clock rolled around and none of their workers had shown up, we called and were told that the worker that was suppose to come had called in sick... Why weren't we notified??? I don't know. To their credit, instead of rescheduling they found workers to come out and start the job. Apparently this type of install is done in stages. Two of their workers came in and removed the old system and installed the new system... only they installed it upside-down. Shouldn't they know where the return air is suppose to come out of? When Zach got here to connect the unit, he and my husband realized the mistake. So Zach called the installers to come back and fix the issue only to have them argue with him. After some persuasion they finally came back and reinstalled it. It's been 12 hours, they still aren't done. Zach is still working hard trying to get us some heat...I appreciate him! I am however starting to freeze and really hoping he will be successful soon. I also hope Zack is rewarded for his hard work and dedication.
Stacey C.
18:46 14 Mar 22
They did a great job and were very prompt with getting the work done!
David R.
01:58 13 Jun 21
Local and prompt helped fix the furnace and showed us the part, now we can do it on our own. We recommend
Karee M.
18:59 12 Feb 21
Fast, friendly service. Knowledgeable and helpful personnel. High quality is obviously a priority. Highly recommend for your heating, cooling, refrigeration and boiler needs.
Shar S.
16:49 10 Dec 19
What a wonderful experience we had working with Terry, the owner. We built a new home with a complicated heating system that had radiant, forced air gas and forced air electric. He made it all come together to work for us. After completion of construction, he always answered all our questions and came out to make any adjustment necessary in a timely fashion. Friendly and professional, I would highly recommend Stephen’s Heating and Air Conditioning for any job, simple or complicated. They are the radiant floor experts in this area and very knowledgeable in forced air and air conditioning homes and businesses. I highly recommend them. You will be very happy with their service.
greg L.
00:17 19 Jul 19
Belknap is a place where a person can really get away. Generally quiet, friendly service, and the pools are great to relax in. New rules make the pools even more quiet. The lack of wi fi helps with the intended separation from stress.
Marlena T.
02:39 12 Apr 19
Fast, friendly, affordable, high quality service you can depend on. Excellent communication with knowledgeable staff make every experience a great one! Highly recommend Stephens!
