How to Troubleshoot HVAC Systems
Today's HVAC systems are more sophisticated than ever before. Consequently, most of the problems with your system will require a service technician armed with the latest diagnostic equipment. Here are some guidelines for troubleshooting your HVAC system before calling in the big guns. Does this Spark an idea?
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Things You'll Need
- HVAC system
- Owner's manual
- Wrench
- Screwdriver
- Key
- Service technician (just in case)
Instructions
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1
Shut off the power to your HVAC system before you begin troubleshooting.
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2
Examine the slope of the radiators and pipes to be sure they slope back in the direction of the boiler. If your HVAC system produces hammering sounds and does not heat, you'll need to correct the slope.
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3
Check the pipes for leaks if the system's water level is repeatedly low. Close the water supply valve and record the water level for several days. Seek the help of a professional if there is a dramatic drop in the water level.
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4
Inspect the amount of air in the expansion tank by gently touching it. When functioning properly, the lower portion of the tank feels warmer than the top. If it feels hot all over, the tank is filled with water and must be drained.
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5
Verify that the radiator's inlet valve is open fully if the radiator is cold and the pipes are tilted correctly. Adjust the vents properly by opening those farthest from the boiler more than those that are nearer.
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6
Remove any air trapped in the radiator by opening the air vent valve so there's no more hissing and water is released. The vent can only be opened with a screwdriver or a key supplied by the manufacturer or purchase one at a heating supply store. Shut the vent and reopen it for the preferred heat.
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7
Scan the pump (aka circulator) for leaks, a damaged seal and/or a broken coupler that separates the motor from the pump. Any problems with the circulator require a service call.
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Know when to call a professional. Generally, a service technician will be required if you need a repair rather than an adjustment to your HVAC.
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Take advantage of available software to troubleshoot and/or diagnose your HVAC system. Contact an HVAC contractor or technician or visit hvac.lifetips.com to obtain the latest computer program.
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Tips & Warnings
Various radiators have automatic valves that don't require opening and closing.
Flush your HVAC system annually to keep pipes clear and water moving easily.
HVAC is the acronym for Heating, Ventilation & Air Conditioning.
