blower problem

[rprice]

when thermostat is set on heat,auto the elements heat up but the blower does not come on unless thermos is moved to fan.If thermos is set on cool,auto blower operates properly.any thoughts on this

[coolguysfl]

RPRICE - I'm confused, your profile is professional but your inquiry suggest otherwise.

You have a control issue, most likely minor in nature, a qualified tech can make a few diagnostics and make quick remedy. There are no consumer repairable items inside your system short of the air filter. Pls call a qualified HVAC tech.

For temporary heat, leave the stat set to ON. (fan mode)

[hvacman06]

what kind of units do you have

[rprice]

I have recently received my cert and started in the field of maint.I have only been doing this a short time and i admit i am in the learning stage of HVAC,My instructor advised me this web site is a great learning stage for a new recruit.I hope to further my knowledge through questions and answers from senior techs. thank you for your time

[rprice]

the units at my job are Goodman 3.5 ton units

[coolguysfl]

Do you have the hand tools & meters to make a few cks?

Pls ID T/stat. Heat Pump S/C?

Pls ID voltage when calling for heat from R-C R-W R-G

[docholiday]

you havent said what you are working on. If it's a heat pump then the same relay that operates the cooling fan also operates the fan in heat mode. If it's a gas unit then why te cryptic message about heating elements? If it's an electric furnace with cooling, then you have to simply look at the schematic and tell US what controls the fan in the heating mode? We already know this but it wouldnt do you any good to not help you figure it out for yourself.

[rprice]

sys is heat pump,i have diag heat seq and determined to be operational,

[coolguysfl]

Has this unit ever run (heat) before?

[rprice]

yes it has run ht before,if i put sys on ht/fan it will run,it just will not run ht auto

[docholiday]

ok...so the sequencer controls the blower in the heating mode.

Have you got line voltage in and line voltage out of that sequencer?

[rprice]

i have volt in the seq but not out of

[docholiday]

and....the answer is.....?????

[rprice]

replace sequencer

[docholiday]

actually before you go there.... do you have 24v to the low voltage connections at the sequencer?

[coolguysfl]

You need to get out the schematic: Depending on the model & vintage the fan (control)of a heat pump is either directly controlled off the G terminal or the sequencer /relay that comes off W

IF this is a HP, then you're saying the blower isn't coming on at all in the heat mode - is that correct?

Are you sure you don't have the Stat set for gas?

[rprice]

no,

[coolguysfl]

Doc - too many conversations at the same time... you take it B4 I confuse him.

[rprice]

that is corret the blower will not come on in the heat mode

[docholiday]

no? then why not? the low voltage should be coming from the w2 or E (or both) terminals from the stat.

[rprice]

you have givin me some other ave's to check,i am beginning to think this could be a stat problem,so i am going to have to check the stat and get back,you have been a great help,i apologize for my noviceness,but just coming into the field out of tech school is quite a learning experience

[docholiday]

dont appologize. I want you to learn to think it through. It's best you know whats supposed to happen and then go through it step by step. I appreciate the fact that you arent guessing your way through it.

Good luck.

[beenthere]

Was the tstat replaced in the spring or summer.

[rprice]

doc you and coolguy have been great,i will let you know what i come up with.

[RoBoTeq]

This thread needs to be moved to the Pro Tech forum.

Rprice, do you have access to the Pro Technical forum on this site?