Hvac Control Panel Fuse

Answered by a verified hvac technician.

Hvac control panel fuse.

Ohms law and hvac heating and cooling technical. Relays and contactors are used in hvac control circuits to turn things on and off such as blower motor. If you find 12 volts on both test points that fuse is good. My furnace is a concord model cg90ub.

If you find 0 volts on both test points that circuit is turned off so that fuse isn t related to the problem. Turn on the ignition switch and turn on any systems you can that are related to the problem then check for those two voltages on each fuse. I turned off the input power and attached terminal r 24 vac power to thermostat and the fuse blew. Visit our website for a full list of blocks and holders.

Introduction the hvac control panel includes the control of temperature humidity and airflow in a particular space. Many of the products we offer can ship in 1 to 3 business days. With an industry leading 3 year limited warranty on most products we guarantee a high quality problem free ul certified control panel. I removed all the wires going to my thermostat and it would not blow the fuse when powered on.

If you use a fuse that is too small the fuse is likely to blow more often but if you use one that is too big it could allow more than the rated amount of amperage reach the unit and cause fatal damage to the system. I went up in the attic and the fuse was ok but i replaced it anyway. I tested the fuses from this week and last week with a multimeter and they test just fine. The fuse is designed to handle a limited amount of amperage based on the maximum amount that the a c is rated for.

For this control the panel has a different part to control these factors. Littelfuse offers a wide variety of ul approved open face finger safe and panel mount fuse holders including. The heating ventilation and air conditioning hvac system is a complex system installed in a building. Today the thermostat was dead again.

Furthermore in case there is a dead short in the control circuit the fuse will prevent the transformer from blowing. Fire can break out at any point within the electricity path if there is a short circuit in the hvac electrical system. I was blowing the 5 amp fuse on the control board for my forced air gas furnace. At the time i suspected i might not have fully locked the cover panel in place and the kill switch might have just popped open.

M tech control has developed many standard hvac products that can help you get your project up and running efficiently and cost effectively. The function of a fuse in an hvac control panel is to protect the hvac equipment and the house from fire hazard. Were is the control panel were the low voltage fuse is located on the trane xe1100 heat pump.