Ask Experts Questions for FREE Help !
Ask
    Benji Scottish's Avatar
    Benji Scottish Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 18, 2007, 08:21 PM
    HVAC (NO Thermastat Display)
    Need Help! I came home to find my family freezing because the HVAC system stopped working. The thermastat has no display. The HVAC company want 200$ just to drive two miles up the road. I figured I would give this a shot before giving money away. I think it may have something to do with a fuse or the contact? However, I am not sure. Any assistance would be great. Please send info to [email protected]

    Sincerely
    Ben wall
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Mar 19, 2007, 07:13 AM
    Does your thermostat have an internal battery that could be dead? Most stats also use 24vdc from a stepdown transformer wired into your hme, check all circuit breakers too.
    HVACxpert's Avatar
    HVACxpert Posts: 13, Reputation: 3
    New Member
    		  
    #3

    Mar 19, 2007, 09:53 PM
    Its 24vac... not 24vdc don't get confused. Probably 3amp fuse on control board... loose wire connection at thermostat... could be bad thermostat... bottom door of furnace came off... tripped limit... bad control board... transformer... Not a whole lot homeowner can check.
    Have fun!
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member
    		  
    #4

    Mar 20, 2007, 04:21 AM
    Yes on the AC. I have to disagree about the average homeowner being able check many of the common problms. With a few tools, they can tackle even bigger problems. One great tool is the sticky at the top of this forum.

    To do simple checks like this you do need some tools. A test light, a meter, or a voltage detector might be the best place to start with. I came across the niftiest gadget for trouble shooting, a voltage detector. They work through the insulation of wires. There are several brands. I have a GB Instruments GVD-505A, less than $15 at Home Depot. Touch it to a hot wire, and the end glows red. Find the doodad that lights it on one side, and not the other, and you have the culprit. You do not have to open up housings and expose electrical contacts. You are looking at where your hand is, not where the meter is. Most people are capable of doing repairs and will get it going and not get hurt if they use a little sense. The voltage detector makes it even easier.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

A/c unit outside won't turn on byitself, thermastat? [ 6 Answers ]

My family went on a trip to see relatives in the country. When we came back the a/c had quit. The inside blower motor works, just the outside unit will not turn on. Everything is fairly new, except for the thermastat on the wall, which is one of those old round mercury like switches. I took the...

Installing thermastat [ 2 Answers ]

Hi. I'm trying to install a programmable thermastat and the directions say to mark the wires before taking them off the old one. They are not marked at all anywhere. I have a red and a white one. Any idea what I should mark them as? Any help would be so appreciated. The electrition I called wants...

Maple Chase Thermastat [ 4 Answers ]

:confused: My thermastat was flashing LOBAT (low battery?) so I put in two new fresh batteries and it is still flashing LOBAT. Should I have turned it OFF first? How do I fix it?

Thermastat wiring issues [ 1 Answers ]

Help please, my boss tried to change the thermastat at work and he messed up. I don't know which wires are to go to which colours. I have 8 wires, 7 were originally used. The wire colours are red, white, blue, brown, black, green,orange and yellow. The orange was not used before. The t'stat has on...

Wiring a new honeywell thermastat to lennox air conditioner [ 1 Answers ]

I have a lennox airconditioner and I am trying to wire a new honeywell thermastat to it. There are 8 wires showing but the thermastat only calls for 5. I need to find out what colors go to what. Colors we have are Yellow Blue Red Orange White Black

View more questions Search